Jack Mulhall, born John Joseph Francis Mulhall, (October 7, 1887 in Wappingers Falls, New York — June 1, 1979 in Woodland Hills, Los Angeles, California) was a movie actor since the silent film era and appeared in over 430 films.

Once served on the board of the Screen Actors Guild.

In the movie Dark Streets (1929), Jack completed the first dual role ever in talking pictures.

Guest-starred in the pilot episode of TV's "How to Marry a Millionaire" (1957) on October 7, 1957, which happened to be his birthday.