Oh, the nostalgia! Mandy Moore posted a throwback photo on Instagram Thursday of herself and fellow "Princess Diaries" star Anne Hathaway. "I guess this film came out just over 17 years ago??" the "This is Us" star captioned the red carpet shot. "@annehathaway was already a movie star and I showed up to my first premiere in a casual denim suit. Hey, it was 2001! #tbt #theprincessdiaries"