Inside you know they’re thinking: “Man, I can’t wait to meet Jack Black on Saturday.” (POOL/REUTERS)

E!’s Mark Malkin reports that Nicole Kidman, Tom Hanks (who has some experience meeting royals), Jack Black (the requisite royal greeter from Tenacious D), Kristen Chenoweth, Derek Hough, Ginnifer Goodwin (a princess of sorts now herself) and Dana Delany are expected to attend.

Us has also reported that Jennifer Lopez and Marc Anthony will be there as well.

Undoubtedly more names will leak over the next couple of days. In the meantime, perhaps Kidman, Hanks and co. can start thinking of topics to discuss with Duchess Catherine and William. How about this for an icebreaker: “So, done any canoe paddling in Canada lately?”