Duking it out?

Kate Middleton, 41, apparently enjoys a good game of beer pong, according to royal family member Mike Tindall, 44 — and she even gets quite competitive.

Middleton, her husband, Prince William, 41, and Princess Anne, 73, joined Tindall and his co-hosts, James Haskell and Alex Payne, for Saturday’s episode of their podcast “The Good, The Bad & The Rugby.”

The group got to talking about Middleton’s athletic abilities.

“I’m not going to say you’re uber competitive, but…” Tindall, who is married to Princess Anne’s daughter, Zara, 42, joked with Middleton.

“I’m not competitive at all,” Middleton coyly replied with a smile.

“I’ve seen her play beer pong!” Tindall shot back.

During the episode, Middleton also admitted that she and her husband have quite the competitive streak when it comes to playing sports.

“I don’t think we’ve managed to finish a game of tennis, the two of us,” Middleton revealed. “It becomes a mental challenge between the two of us.”

William added that it does become a game of “who can out-mental each other.”

Beer pong and tennis aren’t the only activities Middleton enjoys — she also said on the podcast that she loves cold-water swimming, as well as playing Padel, a game similar to tennis.

And, while she was in high school, Middleton was a field hockey player, per CBS News.

The Post reached out to Kensington Palace for comment.

The Prince and Princess of Wales’ children may be taking after them when it comes to sports, as it was recently revealed that Princess Charlotte, 8, is competitive just like her mom.

Middleton in June visited the Maidenhead Rugby Club, where she took part in rugby drills.

“She regularly plays rugby in the back garden with the children — she plays all sports with them,” said Nigel Gillingham, president of the governing body of the Rugby Football Union in England, according to People.

“Apparently Charlotte is very much in her mold — very competitive as well,” Gillingham added.

The podcast episode comes just days after one royal expert said Meghan Markle, 42, could become “more relatable” than Middleton amid her rumored social media return.

“With Kate’s social media presence, we’re given very choreographed glimpses into her perfect, almost ‘too good to be true’ family,” “Elizabeth & Philip” author Tessa Dunlop told OK! UK, per The Daily Record.

“With Meghan, on the other hand, we know that she’s been through hell and back,” she continued. “She doesn’t have the insulation of the institution and a large family.”