Pippa Middleton, Michelle Dockery hang out at Wimbledon

Ever wonder what celebs talk about when the sit near each other at public events? Us too! So leave it to Pippa Middleton and “Downton Abbey” star Michelle Dockery to put those gears in motion.

The British ladies were seated near each at the Wimbledon Tennis Championships on Thursday and they seemed to be getting along swimmingly

Middleton, 30, the younger sister of Kate Middleton -- now Catherine, Duchess of Cambridge -- and her bearded brother James sat in the Royal Box at the All England Lawn Tennis and Croquet Club as they took in the fourth day of the tennis matches.

In front of them were Dockery, 32, who plays Lady Mary Crawley in the wildly popular iTV series that airs on PBS in the States, and her boyfriend John Dineen.

The quartet chatted it up just before the match between Spain’s Rafael Nadal and Czech Republic’s Lukas Rosol and were photographed laughing together a few times.

Oh, to be a seat filler! We have no idea what they were talking about, but we imagine it being totally posh and poised.

Dockery has a bit of history with the Middletons, who previously had visited the set of Julian Fellowes’ lavish period drama.

“Pippa Middleton and James Middleton, Kate’s sister and brother, came to visit the set a few years ago,” Dockery told Vanity Fair in February.

“I think during [season] two . . . it was a long time ago. They are friends of Alastair Bruce who is our historical adviser and the royal correspondent [for Sky News], so he’s had a lot of involvement with the royal family,” she explained. “That’s why they came. And it was shortly after the [royal] wedding. It was amazing talking to them. And I hear that Will and Kate are fans, too, which is great.”

Royals watching fictional aristocracy? We are beyond amused!

Middleton, she of the perky posterior, recently sat down with “Today’s” Matt Lauer for what’s being touted as the “first-ever TV interview” with Prince George’s auntie.

“[O]bviously she has pressures that she’s taken on and things. But we spend a lot of time together,” she told Lauer when asked what had changed between the sisters since Kate got married (via USA Today). “We still do a lot together as a family. And I think that’s really the heart for all of us is having a really close family that we can sort of be normal with each other, treat each other normally.”

The sit-down, which took place in London following Middleton’s 3,000-mile U.S. bike trip, will air in two parts on Monday and Tuesday.

Royal adjacent much? Follow me @NardineSaad.