I was watching The Reluctant Astronaut (Don Knotts, 1967) on AMI last night. I recognized Pamelyn Ferdin (Mary in “And the Children Shall Lead,” ST: TOS) immediately, and thought one of Don’s little nieces looked awfully familiar. Checking IMDB, I found she was none other than Melissa Gilbert, of Little House on the Prairie fame.
Billy Sands, aka Harrison “Tinker” Bell on McHale’s Navy, was also in the movie as “Airport Announcer” and “Man Mopping Floor in [a Janitor Training] Film.”
I remember that one! Russell was …
… the murderer the police were looking for in a televised appeal for information, and they caught him because he kept putting peanuts into his Coca-Cola, like they knew the killer did. He’d been sitting in the TV studio the whole time!
David Soul of later Starsky & Hutch fame had a small Star Trek appearance in heavy makeup: Makora | Memory Alpha | Fandom
Meat Loaf is also in there, as another vampire lord.
The difference, I suppose, is that one can readily believe Meat Loaf being in a movie that sucked. 
Another recent one from American Gods, Dane Cook in a non-comedic role.
The actors that played Cooter, Enos, and Bo on Dukes of Hazzard all appeared in Smokey and the Bandit: Login
Michael Hall from Dexter was the narrator of a WW 2 documentary on history channel.
Dexter Dupont, who played several roles on the Twilight Zone, including an angel in Coon Hunt, was a Mafi Hit Man on 77 Sunset Strip.
Good Lord, one must have some principals!
Or principles.
Whatever.
A very young Ann Jillian in “Mute” on tonight’s Twilight Zone. Wow! I *knew *she looked familiar!
That’s, uh, Robert Mitchum’s kid.
There’s a Clint Eastwood movie called Firefox, in which he plays an American pilot who is secreted into the Soviet Union to steal a super-advanced new fighter jet. One of his last contacts is an engineer who works on the aircraft, played by Nigel Hawthorne.
Keep an eye out for the episode Caesar and Me with a young actress named Susanne Cupito. As an adult she took the stage nameMorgan Brittany.
That explains much.
BTW Boone played the bad guy in Robert Mitchum’s film The Big Sleep.
Wow … 133 posts in and nobody has mentioned Hell is for Heroes, a WWII flick made in 1962, starring Steve McQueen, Bobby Darin, Fess Parker, James Coburn, and [introducing] Bob Newhart!
For those who don’t know, as a stand-up comedian, Bob Newhart’s schtick was to have a monologue based on one-sided telephone calls. That is, he would speak as if he were holding a phone, and all you heard was his sided of the conversation. In the movie, he pulls this off using a radio, and it is one of the funniest bits I’ve ever seen in a war movie.
I don’t think it’s been mentioned yet (forgive me if I’m wrong), but Fail Safe similarly has a lot of familiar faces in it, but with the added advantage that a lot of the actors in this tense Cold War drama (basically Dr. Strangelove without the dark humor) are much better known for light comedic roles:
Larry Hagman, a year before I Dream of Jeannie
Walter Matthau, already getting well-known and in several films, but still not really famous.
Sorrell Booke, ages before being Boss Hogg in Dukes of Hazard
Dom Deuise (known on Broadway, but not yet big on TV or movies) in an utterly humorless part as a Technical Sergeant.
There were two movies made in 1964 about the possibility of nuclear war. One of them had Dom DeLuise and Larry Hagman. The other was a comedy.
Also Fritz Weaver and Dana Elcar.
Nitpick: It was a field phone, not a radio. The Germans had tapped into the ground line, and Bob was using his shtick to feed them disinformation.
I saw that movie with my dad when I was seven years old. It made a huge impression on me.
Dom’s interpretation of his role was diametrically opposed to the portrayal of the sergeant in the book.
In the book, he’s a big, dumb lifer who’s intent on pleasing the brass. It never occurs to him that he’s aiding the Russians and helping to kill American airmen.
In the movie, he’s a conflicted whiner who gives up his information reluctantly because he knows he’s aiding the Russians and helping to kill American airmen.
I thought I had a thread winner, Gwyneth Paltrow in 1776. I read somewhere that her mother, Blythe Danner, was pregnant with Gwyneth during filming. But I double checked and it’s not true.