The couple got hitched earlier this month at their former Thousand Oaks, CA home, and Sam says the intimate guest list of about 50-70 people was perfect -- "We wanted to celebrate with, you know, our loved ones, our close people. We wanted to just celebrate, and that's what we did."
As for why SA was doing this 'GMA' interview ... well, call it one of the perks of marrying Britney Spears -- he was promoting his role in an action film, where he costars with Mel Gibson.
Sam says he's grateful for any opportunities he gets because of Brit, but clearly doesn't want anyone thinking he's just riding her coattails. As he says, "Let's not take away from the fact I've been working hard, and I was already acting."
One thing's for sure ... whether it's the new wife, new mansion, new movie roles or the combo of all of the above -- newlywed life agrees with Sam.