The Late Late Show With James Corden earlier this week, the opened up about the hilarious incidents that she'll never forget.
And neither will we. In the interview, pulled up a photo of a young Collins with the Princess of Wales, and spilled the tea.
In the image, a two-year old Collins appears to be handing Princess Diana a bouquet of flowers. "I have been told that this is what happened," Collins said. "I'm giving Diana flowers and the second she went to take them, I then tried to pull them back.
So, as you can imagine, all the air was sucked out of the room. But then again, I was wearing a cute dress, so who's going to really punish me?"Apparently, Lily Collins's run-ins with the British royals didn't stop with Princess Diana.