BFF alert! After meeting at a July 10 charity event in Hollywood Hills, Reese Witherspoon and Kate Middleton hit it off so well, they exchanged info and have been e-mailing and calling each other ever since!

“They’re both high-profile women and newlyweds, so they instantly bonded,” says a pal of Reese’s. And the ladies are each other’s biggest fans. “Two of Kate’s favorite movies are Walk the Line and Legally Blonde,” says an insider, while the pal adds that Reese, 35, had recorded Kate’s wedding and has it “memorized.” The actress has joked that Kate, 29, who wed a month later, even called her to ask what dress she was wearing.