Does Actor Richard Chamberlain Resemble Dick Van Dyke?

The Three Musketeers actor Richard Chamberlain may resemble comedian Dick Van Dyke and another actor, actress or possibly a group from some TV series or movie I was not quite sure of. Connections: Actress Mary Tyler Moore worked with both. She was in the main cast of The Dick Van Dyke Show (1961-1966) on CBS. Chamberlain and her were in a 1966 Broadway stage play theatrical / musical production of Breakfast at Tiffany's, based on the 1958 Truman Capote novella and 1961 film with Audrey Hepburn. After only four previews the show production was closed by producer David Merrick.