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These days, Mark Wahlberg is busy promoting his film "2 Guns" alongside Denzel Washington, but his next project, "Transformers 4? will be a family affair.

"All four of them are going to be in the movie," the actor told ABC News. "They're excited about that."

Wahlberg, 42, and his wife of nearly four years, Rhea Durham, are parents to Ella, 12, Michael, 7, Brendan, 4, and Grace, 3 - who have yet to see his films, the actor said.

However, they've undoubtedly noticed the changes that each role causes in their dad's appearance.

After shooting "Pain & Gain," Wahlberg said that he had to lose weight for "2 Guns."

"I came in at 212 lbs., and I had to lose all the weight," he said. "I did it just playing basketball, changing my diet - doing the work."

Durham, 35, is supportive.

"I like him any way," she said.