The 'I Feel Pretty' actress opened up to ET about why she feels she should be a guest at the most hotly anticipated nuptial ceremony of the year.
Busy Philipps and future royal Meghan Markle once co-starred together during an episode of short-lived sitcom so, naturally, the Vice Principals actress says she's a little confused as to why she still hasn't gotten her invitation to the royal wedding.
"I have the smallest connection of all time and I'm waiting for my invitation, Meghan. Where is it?!" Philipps told ET's Kevin Frazier at the premiere of her new film, I Feel Pretty, at the Westwood Village Theatre in Westwood, California, on Tuesday. "I'm obsessed! I can't wait for the royal wedding!"
As for their tenuous connection, the actress explained, "Meghan was a guest star on a UPN sitcom that I starred on called Love, Inc. 13 years ago. She did one episode, she had like three lines. She was lovely."
Which is exactly why Philipps jokingly asked one very important question: "Where's my f**king invitation?!"
For those interested, Markle appeared on the ninth episode of the first (and only) season of Love, Inc. titled "One on One," playing a character named Teresa Santos. The episode aired in November 2005, more than six years before the start of Markle's run on USA Network's Suits.
The day Markle and Prince Harry confirmed the news of their engagement, Philipps took to Instagram to lament her failure to befriend the actress back when she had the chance.
"Bummed I didn't become BFFs with Meghan Markle when she guest starred on the UPN sitcom I did in 05," Philipps tweeted, along with three shrug emojis.
While she may not have become besties with Markle, Philipps did become lifelong friends with her former Dawson's Creek co-star Michelle Williams. The pair have remained incredibly close since the TV drama came to a close in 2003, and now they are both co-staring in I Feel Pretty.
The best friends hit the red carpet together at Tuesday's premiere, and they couldn't have been cuter posing for photographers. Philipps stunned in a strapless, bedazzled black Christian Siriano gown, while Williams looked regal in a plunging, long-sleeved black dress.
Both Williams and Philipps appear opposite star Amy Schumer, but the two never share a scene together, which Philipps said was disappointing.
"It was kind of a bummer. But you know my husband is one of the writers and directors of the movie and so next time he needs to do better," she said of her husband of nine years, Marc Silverstein. "He needs to put us in scenes together!"
"But I luckily I get to share my scenes with Aidy Bryant and Amy Schumer, so I'm good," she added with a smile.
While fans of the royal family with have to wait until May 19 to watch Markle tie the knot with Prince Harry, I Feel Pretty hits theaters on April 20.
Busy Philipps Drunk Dyes Michelle Williams' Hair Pink Because Friendship Is a Special Thing -- Watch!