Keira Knightley is showing off her “one and only party trick”! The 35-year-old Pirates of the Caribbean actress made an appearance on World Health Day’s #HopeFromHome livestream earlier this week where she decided to play “Yesterday” by The Beatles on her teeth. PHOTOS: Check out the latest pics of Keira Knightley “I was thinking of something entertaining to do and I couldn’t think of anything,” Keira said. “So I’m going to play my teeth, which is my one and only party trick.” This isn’t the first time Keira showed off her trick.