A bronze plaque honoring Jimmy Stewart was unveiled at Los Angeles' Griffith Park, where the late actor sponsored an annual relay marathon for charity.

Two of Stewart's three children were among the 75 people gathered for the ceremony Wednesday, which would have been their father's 90th birthday. Stewart, the star of "It's a Wonderful Life" and "Mr. Smith Goes to Washington," died last July.A flock of white doves was released after the plaque was unveiled atop a rock monument surrounded by flowers.