The 19-year-old actress — who plays Arya Stark on the HBO fantasy drama — took to Twitter Monday to ask her followers to share pictures of the on-screen sisters from when the show first began. "Can u pretty please send me funny pictures of Sophie and I when we were well young?," she wrote. "They make me laugh so much."
However, after receiving a barrage of hilarious shots, Williams apparently began to regret her request. "What have I done," she tweeted mere minutes later.
Check out some of the best photos of the pair below.