"She was a few years ahead of me but yes, we had I believe the same acting teacher and met sort of early on when I was a freshman," the American Horror Story actress told 9Honey. "I was introduced by our acting teacher that she would show me the ropes and show me around campus a little bit, and she was very lovely."
The Duchess of Sussex graduated in 2003, a year before Rabe, but the latter revealed they had been in touch since then, though she noted they haven't seen each other "in a while."
Coincidentally, Rabe's AHS costar Billy Eichner also attended the Illinois college, graduating in 2000.
The Parks and Recreation alum had the opportunity to chat with Meghan and Prince Harry at the London premiere of The Lion King in 2019, as he had a voiceover role in the movie.
"They were both super down to earth and lovely and Meghan and I talked about our @NorthwesternU acting teachers (shout out to Mary Poole and David Downs!) ❤️," Eichner tweeted after the event.
He also dished on the encounter during an episode of Jimmy Kimmel's talk show.
"I completely freaked out," he admitted. "Although they were very, very nice."
The comedian revealed that prior to the red carpet, the entire cast received an email revealing the protocols about interacting with the royals.
"They are very intense about it. I'm not kidding," he noted. "My guest I brought with me, my very good friend Jared, they said he had to stand behind me and not speak unless he was spoken to. I was like, 'Does that same rule apply to Jay-Z?' I have a feeling it doesn't."