The two blondes bonded over lunch at Boa Steakhouse in Beverly Hills Friday. After the meal, Witherspoon, 35, even gave 21-year-old Swift a lift home. (See the pictures at Just Jared.)
Witherspoon isn't the only big star Swift has spent time with this week. Justin Bieber, 17, surprised the singer on stage at the Staples Center in L.A. Tuesday night, where the two performed a cover of his hit song "Baby." On Thursday, singer-songwriter Jason Mraz, 34, joined Swift for a rendition of "I'm Yours" at the same venue.
Swift is expected to attend Sunday's MTV Video Music Awards, where she is nominated in the "Best Video With a Message" category for "Mean."