Separated at birth

 
[The actors Andrew Tombes and Don Lake.]

Andrew Tombes was in many, many movies. I know Don Lake best from Christopher Guest’s faux documentaries.

Also separated at birth
Nicholson Baker and Lawrence Ferlinghetti : Bérénice Bejo and Paula Beer : Ted Berrigan and C. Everett Koop : David Bowie and Karl Held : Victor Buono and Dan Seymour : John Davis Chandler and Steve Buscemi : Ray Collins and Mississippi John Hurt : Broderick Crawford and Vladimir Nabokov : Ted Cruz and Joe McCarthy : Benedict Cumberbatch and Michael Gough : Henry Daniell and Anthony Wiener : Jacques Derrida, Peter Falk, and William Hopper : Elaine Hansen (of Davey and Goliath) and Blanche Lincoln : Barbara Hale and Vivien Leigh : Harriet Sansom Harris and Phoebe Nicholls : Ton Koopman and Oliver Sacks : Steve Lacy and Myron McCormick : William H. Macy and Michael A. Monahan : Fredric March and Tobey Maguire : Molly Ringwald and Victoria Zinny