In a radio interview with The Bert Show, the Transformers star tried to downplay his success with a bit of a shot at Muniz, after a host mentioned that Wall Street 2 was the sixth No.1 film in a row that LaBeouf has starred in.
"While that's flattering as hell, you could have put Frankie Muniz into any of the movies I've been in and those movies still would've still been No. 1," said LaBeouf.
But the putdowns on the former Malcolm in the Middle star didn't stop there.
When asked if he was concerned that Muniz might approach him at a party about his "put Muniz in my movies" comment, LaBeouf said, "I don't go to many parties…and I really don't hang out in Frankie Muniz-type zones."
Muniz wasn't about to take that lying down.
Popping out of his, er, zone after LaBeouf's interview, Muniz tweeted, "Dear Shia LaBeouf, It's getting creepy the fact that you can't stop talking about me. It's been 12 years now. I don't know you. Thanks."
Here's some backstory on this feud:
In 2003, LaBeouf kicked off the spat in an interview with Entertainment Weekly, saying that Muniz wasn't the friendliest kid in his Malcolm in the Middle heyday.
"I used to see him at premieres and stuff and it would always be like he was looking down on me," LaBeouf said. "And then it turned into we're equal, and then it turned into, ‘Oh Frankie, I know that guy.' "
"After 4 years of retirement from Hollywood...I think I'm gonna pull a Michael Jordan." Muniz tweeted Friday.
Watch your back, LaBeouf.
(Originally published Oct. 2, 2010, at 4:22 p.m. PT)