The Walk the Line Oscar winner, 34, is star No. 2,425 to receive the honor, and James L. Brooks, who wrote and directed Witherspoon's latest movie, How Do You Know, introduced the actress to the crowd gathered on Hollywood Boulevard, reports the Los Angeles Times.
Also joining in to mark the moment: Bruiser (not pictured), Witherspoon's canine costar from Legally Blonde.
Witherspoon posed for pictures while her boyfriend, agent Jim Toth, kept her parents company in the audience.
Official "star" status aside, Witherspoon's kids – from her marriage to ex-husband Ryan Phillippe – see her as a "regular, embarrassing old mom."
"Realizing you're not anything special to the kids is always a great sort of reminder that you're just a regular person," she told Parents magazine in February 2009. "They know what I do for a living – that I'm an actress – but they haven't seen any of my movies yet."