Which actor won the first of his two Best Actor awards for playing one half of the feuding parents in 1979's "Kramer vs. Kramer"?

"Kramer vs. Kramer" is one of very few movies to sweep all five "big" Oscars: Best Picture, Best Director, Best Actor, Best Supporting Actress, and Best Screenplay. It's also one of very few films to win Best Picture and be the most commercially successful film of the year; that wouldn't happen again until 1997's "Titanic." In other words, yeah, it's a pretty good movie.

Asked by Beth Sederstrom · Last updated 6 months ago · 1M views · SOURCE