Thomas Noel Rettig (December 10, 1941 – February 15, 1996) was an American child actor, computer software engineer, and author. Rettig is remembered for portraying the character "Jeff Miller" in the first three seasons of CBS's Lassie television series, from 1954 to 1957, later seen in syndicated re-runs with the title Jeff's Collie. He also co-starred with another former child actor, Tony Dow, in the mid-1960s television teen soap opera Never Too Young and recorded the song by that title with the group, The TR-4.