Ronnie Cosby (born Ronald Lee Cosbey) was an American actor who appeared in films during his early childhood to beginning of teens years.
| Movie | Birth of the Blues | Jeff as a Boy | 1941-11-07 |
| Movie | The Marines Are Here | Tommy Foster | 1938-06-08 |
| Movie | Madame X | Peter Simonds | 1937-10-01 |
| Movie | Wells Fargo | Ramsay MacKay Jr. | 1937-12-31 |
| Movie | Next Time We Love | Kit | 1936-01-30 |
| Movie | Boulder Dam | Peter Vangarick | 1936-03-07 |
| Movie | Sutter's Gold | John Sutter Jr. - Age 8 | 1936-03-01 |
| Movie | West Point of the Air | Mike - as a Boy | 1935-03-23 |
| Movie | Oil for the Lamps of China | Bunsy Wellman | 1935-06-08 |
| Movie | Public Opinion | Tommy Arnold | 1935-03-14 |
| Movie | Moonlight on the Prairie | Young Boy | 1935-11-02 |
| Movie | I Live My Life | Alvin (Uncredited) | 1935-10-04 |
| Movie | Personal Maid's Secret | Bobby Smith | 1935-10-26 |
| Movie | Shipmates Forever | Little Boy (uncredited) | 1935-10-12 |
| Movie | Little Men | Rob Bhaer | 1934-01-01 |
| Movie | Registered Nurse | Dickie | 1934-04-06 |
| Movie | Housewife | Buddy Reynolds | 1934-08-11 |
| Movie | Now I'll Tell | Tommy Doran Jr. | 1934-06-07 |
| Movie | The Circus Clown | Dickie Madison | 1934-06-30 |
| Movie | Broadway Bad | Big Fella | 1933-02-24 |
| Movie | The Iron Master | Little Billy Stillman as a Small Child | 1933-02-04 |
| Movie | Heroes for Sale | Young Bill Holmes (uncredited) | 1933-06-17 |
| Movie | King of the Jungle | Kaspa, aged 3 | 1933-03-10 |
| Movie | Broadway Thru a Keyhole | Little Boy | 1933-11-02 |
| Movie | Ever in My Heart | Teddy 'Sonny' Wilbrandt | 1933-10-28 |
| Movie | Deluge | Ronny Webster | 1933-08-17 |
| Movie | The Man from Yesterday | Baby Tony | 1932-06-24 |
| Movie | Hush Money | Baby (uncredited) | 1931-07-05 |
| Movie | East Lynne | William as a Child | 1931-03-01 |
| Movie | Madame X | Boy at Puppet Show (uncredited) | 1929-08-17 |