| Title | Year | Status | Character |
|---|
| The Arizonian | 1935 | | Pompey |
| The Nitwits | 1935 | | Sleepy |
| Hit and Rum | 1935 | Short | Shoe shine man (uncredited) |
| Murder on a Honeymoon | 1935 | | Willie (as Sleep 'n' Eat) |
| West of the Pecos | 1934 | | Jonah (as Sleep 'n' Eat) |
| Kentucky Kernels | 1934 | | Buckshot (as Sleep 'n' Eat) |
| Little Miss Marker | 1934 | | Dizzy Memphis (uncredited) |
| Disorderly Conduct | 1932 | | Man at Police Station (uncredited) |
| The Monster Walks | 1932 | | Exodus (as Sleep n' Eat) |
| The Guilty Generation | 1931 | | Club Merlin Doorman (uncredited) |
| Up Pops the Devil | 1931 | | Laundryman (as Sleep 'n' Eat) |
| The Virtuous Husband | 1931 | | Luftus |
| Taxi | 1931 | Short | |
| Deep South | 1930 | | |
| Feet First | 1930 | | Janitor (as Sleep 'n' Eat) |
| Ladies of Leisure | 1930 | | George - the Elevator Operator (uncredited) |
| My Little Margie | 1952-1955 | TV Series | Charlie / Willie / Elevator Boy / ... |
| The Stu Erwin Show | 1950-1955 | TV Series | Willie |
| Waterfront | 1954-1955 | TV Series | Billy Slocum |
| Meet the O'Briens | 1954 | TV Movie | Willie |
| Racket Squad | 1951-1952 | TV Series | Janitor / Cleaning Man |
| Mark Saber | 1951 | TV Series | |
| South of Caliente | 1951 | | Willie, Stable Boy |
| High and Dizzy | 1950 | Short | Wesley |
| Jiggs and Maggie in Jackpot Jitters | 1949 | | Willie (uncredited) |
| Shanghai Chest | 1948 | | Willie Best (uncredited) |
| Smart Woman | 1948 | | Train Porter (uncredited) |
| Half Past Midnight | 1948 | | Andy Jones, nightclub janitor |
| The Red Stallion | 1947 | | Jackson |
| Suddenly It's Spring | 1947 | | Porter on Train |
| Dangerous Money | 1946 | | Chattanooga Brown |
| No Leave, No Love | 1946 | | Piano Delivery Man (uncredited) |
| The Bride Wore Boots | 1946 | | Joe |
| The Face of Marble | 1946 | | Shadrach |
| The Red Dragon | 1945 | | Chattanooga Brown |
| She Wouldn't Say Yes | 1945 | | Porter (uncredited) |
| Hold That Blonde! | 1945 | | Willie Shelley |
| Pillow to Post | 1945 | | Lucille, Colonial Auto Court Porter |
| The Monster and the Ape | 1945 | | Flash |
| Music for Millions | 1944 | | Red Cap (uncredited) |
| The Mark of the Whistler | 1944 | | Men's Room Attendant (uncredited) |
| The Girl Who Dared | 1944 | | Woodrow |
| Home in Indiana | 1944 | | Mo' Rum (uncredited) |
| The Adventures of Mark Twain | 1944 | | George (uncredited) |
| Thank Your Lucky Stars | 1943 | | Soldier in 'Ice Cold Katy' Number (uncredited) |
| The Kansan | 1943 | | Bones |
| Dixie | 1943 | | Steward (uncredited) |
| Cabin in the Sky | 1943 | | Second Idea Man |
| Cinderella Swings It | 1943 | | Hipp |
| The Powers Girl | 1943 | | Men's Room Attendant (uncredited) |
| The Hidden Hand | 1942 | | Eustis the Chauffeur |
| Scattergood Survives a Murder | 1942 | | Hipp |
| Busses Roar | 1942 | | Sunshine |
| A-Haunting We Will Go | 1942 | | Waiter |
| Maisie Gets Her Man | 1942 | | Sam, Room Service Waiter (uncredited) |
| Juke Girl | 1942 | | Jo-Mo |
| Whispering Ghosts | 1942 | | Euclid Brown |
| The Body Disappears | 1941 | | Willie |
| West of the Rockies | 1941 | Short | |
| Nothing But the Truth | 1941 | | Samuel |
| Minstrel Days | 1941 | Short | Singer |
| The Smiling Ghost | 1941 | | Clarence |
| Highway West | 1941 | | Bub Wellington |
| Kisses for Breakfast | 1941 | | Arnold |
| The Lady from Cheyenne | 1941 | | George |
| Scattergood Baines | 1941 | | Hipp |
| Road Show | 1941 | | Willie |
| Flight from Destiny | 1941 | | George |
| High Sierra | 1941 | | Algernon |
| Who Killed Aunt Maggie? | 1940 | | Andrew |
| Money and the Woman | 1940 | | George Washington Jones, Dave's Servant |
| The Ghost Breakers | 1940 | | Alex |
| Blondie on a Budget | 1940 | | Newsboy (uncredited) |
| I Take This Woman | 1940 | | Sambo |
| Slightly Honorable | 1939 | | Art, the Elevator Operator |
| Miracle on Main Street | 1939 | | Duke |
| Private Detective | 1939 | | Norton's Valet |
| The Covered Trailer | 1939 | | Baltimore |
| At the Circus | 1939 | | Redcap (uncredited) |
| Blackmail | 1939 | | Bunny - the Janitor (uncredited) |
| Way Down South | 1939 | | Chimney Sweep (uncredited) |
| Mr. Moto Takes a Vacation | 1939 | | Driver (uncredited) |
| Nancy Drew... Trouble Shooter | 1939 | | Apollo Johnson |
| Mr. Moto in Danger Island | 1939 | | Launch Pilot (uncredited) |
| The Saint Strikes Back | 1939 | | Algernon, Simon's Butler (uncredited) |
| Prairie Papas | 1938 | Short | |
| Blondie | 1938 | | Porter |
| Spring Madness | 1938 | | Porter on Train (uncredited) |
| Straight Place and Show | 1938 | | Hannibal (uncredited) |
| Youth Takes a Fling | 1938 | | George |
| A Western Welcome | 1938 | Short | Sweet Pea |
| I'm from the City | 1938 | | Train Porter (uncredited) |
| Vivacious Lady | 1938 | | Train Porter |
| Goodbye Broadway | 1938 | | Jughead |
| Merrily We Live | 1938 | | George |
| Gold Is Where You Find It | 1938 | | Joshua |
| Everybody's Doing It | 1938 | | Jasper - Elevator Operator (uncredited) |
| Crashing Hollywood | 1938 | | Train Porter (uncredited) |
| Deep South | 1937 | Short | |
| Mississippi Moods | 1937 | | |
| Saturday's Heroes | 1937 | | Sam |
| The Lady Fights Back | 1937 | | McTavish |
| Super-Sleuth | 1937 | | Warts |
| Meet the Missus | 1937 | | Mose, Shoe Shine Boy |
| You Can't Buy Luck | 1937 | | Airline Porter (uncredited) |
| Breezing Home | 1937 | | Speed |
| Criminal Lawyer | 1937 | | Janitor (uncredited) |
| Racing Lady | 1937 | | Brass |
| We Who Are About to Die | 1937 | | Airport Porter (uncredited) |
| Dog Blight | 1936 | Short | Sleepy |
| Night Waitress | 1936 | | Black Pedestrian (uncredited) |
| General Spanky | 1936 | | Henry (as William Best) |
| Make Way for a Lady | 1936 | | William Townley, Jackson's Chauffeur (uncredited) |
| Thank You, Jeeves! | 1936 | | Drowsy |
| Mummy's Boys | 1936 | | Catfish |
| Down the Stretch | 1936 | | Noah (as William Best) |
| The Green Pastures | 1936 | | Henry - the Angel (uncredited) |
| The Bride Walks Out | 1936 | | Smokie |
| Murder on a Bridle Path | 1936 | | 'High-Pockets' |
| Two in Revolt | 1936 | | Eph |
| Silly Billies | 1936 | | Excitement (uncredited) |
| The Lady Consents | 1936 | | Sam - Jim's Servant (uncredited) |
| Muss 'em Up | 1936 | | Janitor at Spivali's Bar (uncredited) |
| The Littlest Rebel | 1935 | | James Henry |
| To Beat the Band | 1935 | | Elevator Operator (uncredited) |
| Annie Oakley | 1935 | | Second Cook (uncredited) |
| Hot Tip | 1935 | | Apollo |
| Jalna | 1935 | | Sam, the Janitor (uncredited) |
| Title | Year | Status | Character |
|---|
| Nat King Cole: Afraid of the Dark | 2014 | Documentary writer: "I Love You For Sentimental Reasons" - as William Best | |
| New Girl | 2011-2012 | TV Series writer - 2 episodes | |
| Cuéntame | 2012 | TV Series writer - 1 episode | |
| Private Practice | 2010 | TV Series writer - 1 episode | |
| Desperate Housewives | 2010 | TV Series writer - 1 episode | |
| Before You Say 'I Do' | 2009 | TV Movie music: "I Love You for Sentimental Reasons" - uncredited | |
| The X-Files | 2002 | TV Series writer - 1 episode | |
| Kuutamolla | 2002 | writer: "Sua lemmin kuin järjetön mä oisin I Love You for Sentimental Reasons" | |
| What's the Worst That Could Happen? | 2001 | writer: "Sentimental Reasons" | |
| The Parent Trap | 1998 | writer: "I Love You For Sentimental Reasons" - as William Best | |
| As Good as It Gets | 1997 | writer: "FOR SENTIMENTAL REASONS I LOVE YOU" - as William Best | |
| Baadasss TV | 1994 | TV Series documentary music - 1 episode | |
| The Cemetery Club | 1993 | writer: "For Sentimental Reasons" - as William Best | |
| Driving Miss Daisy | 1989 | writer: "I LOVE YOU FOR SENTIMENTAL REASONS" 1945 - as William Best | |
| The Wonder Years | 1988 | TV Series writer - 1 episode | |
| China Girl | 1987 | writer: "Sentimental Reasons" - as W. Best | |
| Slam Dance | 1987 | music: "For Sentimental Reasons" - as William Best | |
| Gomer Pyle: USMC | 1966 | TV Series writer - 1 episode | |
| Show Time at the Apollo | 1955 | TV Series writer - 1 episode | |
| For Sentimental Reasons | 1951 | Short writer: "I Love You For Sentimental Reasons" | |
| Movietone Melodies: Red Ingle and His Gang | 1950 | Short writer: "I Love You for Seventy Mental Reasons" | |
| Sepia Cinderella | 1947 | lyrics: "Is It Right" / music: "Is It Right" | |
| For Sentimental Reasons | 1947 | Short writer: " I Love You For Sentimental Reasons" | |
| Thank Your Lucky Stars | 1943 | performer: "Ice Cold Katy" 1943 - uncredited | |
| Maisie Gets Her Man | 1942 | performer: "Happy Days Are Here Again" 1929 - uncredited | |
| The Littlest Rebel | 1935 | performer: "Turkey In The Straw" - uncredited | |