National Lampoon's Christmas Vacation is a film that stars an actor known for playing Dr. Leonard Hofstadter in what CBS sitcom?
Johnny Galecki John Mark Galecki (born April 30, 1975) is an American actor. He is known for playing David Healy in the ABC sitcom "Roseanne" from 1992 to 1997 and Dr. Leonard Hofstadter in the CBS sitcom "The Big Bang Theory" since 2007. Galecki also appeared in the films "National Lampoon's Christmas Vacation" (1989), "Prancer" (1989), "Suicide Kings" (1997), "I Know What You Did Last Summer" (1997), "Bookies" (2003), and "In Time" (2011).
Efrem Zimbalist Jr. Efrem Zimbalist Jr. (November 30, 1918 – May 2, 2014) was an American actor known for his starring roles in the television series "77 Sunset Strip" and "The F.B.I." He is also known as recurring character "Dandy Jim Buckley" in the series "Maverick" and as the voice behind the character Alfred Pennyworth in "" and associated spin-offs. He also voiced Doctor Octopus in the 1990s "Spider-Man" animated series, and Justin Hammer from the second season of the 1994 "Iron Man" animated series.