Dylan Efron defended Ashley Tisdale against all the “toxic” mom group drama.

Tisdale — who co-starred with Efron’s brother, Zac Efron, in 2006’s “High School Musical” — made headlines after publishing an essay about breaking up with a group of “mean girl” mom friends that includes Hilary Duff, Mandy Moore and Meghan Trainor.

Asked about the viral fallout on Wednesday’s episode of “Watch What Happens Live with Andy Cohen,” Dylan, 33, was somewhat clueless — but insisted Tisdale could not be to blame.

“I try to stay out of that, so I don’t know too much. All I know is Ashley, since I was a kid, she’s been so sweet to me,” he explained to the inquiring caller.

“So I can’t envision her doing anything malicious to the mom group. Hopefully, it’s just a misunderstanding? I honestly don’t know what’s going on, though.”

Host Cohen, who admittedly loves to stir the pot, interjected, “It seems, like, maybe more than a misunderstanding.”

Dylan cowered as he acknowledged, “Yeah, it is,” but reiterated, “I honestly don’t know what happened. All I can say is she’s been so sweet.”

The “Traitors” Season 3 winner, who went on to compete on “Dancing With the Stars” Season 34, noted that the actress even came to the ballroom one night to “support” him from the audience.

“Like, I can’t see where this drama would come from,” he said, prompting Cohen, 57, to quip of her “DWTS” attendance, “Yeah, she had time on her hands ’cause she got dumped from the mom group.”

However, he made sure to emphasize that he does actually “love her.”

Earlier this month, Tisdale, 40, penned an article for The Cut in which she described feeling “not cool enough” after being excluded from some of her mom group’s hangouts, eventually prompting her to step away from those friendships.

Though her publicist initially claimed her client was referring to a different mom group, Duff’s husband, Matthew Koma, confirmed that wasn’t the case by clapping back with a shady post mocking the “Suite Life of Zack & Cody” star.

Notably, Tisdale no longer follows Duff or Moore on Instagram but does still follow Trainor.