Liv Tyler's Son: Mommy is 'My Princess'
10/23/2008 AT 09:00 AM EDT
"He likes to call me his princess," says Tyler, whose The Incredible Hulk and The Strangers both came out on DVD Tuesday. "He says, 'Oh, mommy, you're so cute. You're my precious, precious mommy.' "
The single mom, who split last spring from her rocker husband Royston Langdon, appreciates the positive affirmation – even if it comes at a price.
"He's at that age now where he's so sweet and so loving and says the sweetest things to me," the actress, 31, tells PEOPLE. "Of course I still get karate chops and all those sorts of things too."
Milo also isn't beyond fixing his mom up, albeit with her green-skinned, computer generated costar.
"One day he went on a play date, and he said to this other child who was playing with a Hulk toy, 'My mommy loves the Hulk,' " said Tyler.
For more on Liv Tyler, pick up this week's PEOPLE, on newsstands Friday
2005: Liv and baby Milo suit up for Halloween