Liv Tyler was driving alone and saw the incident taking place on the sidewalk – someone who appeared to be a grandmother or caretaker for a boy was screaming at him and hitting him on the chest as he sat in his stroller wailing.

Liv Tyler almost caused an accident and she hit the brakes, did a U-turn, and pulled over on the side of the road to reprimand the woman. Unfortunately the woman didn’t speak English and kept telling Tyler “No entiendo. (I don’t understand.)” Liv was telling her “You can’t do that! I’m going to call the police; I’m going to call Child Services!”

Liv tried to comfort the crying boy and when she finally walked away to go back to her car, she told X17, “When I saw that, I couldn’t take it. I had to do something.”

X17.com has the pictures

Tyler, best known for her role as elf princess Arwen in the “Lord of the Rings” movie trilogy, wed Langdon, bass guitarist from alternative rock group Spacehog, at a ceremony in the Caribbean in 2003.

A spokesperson for Tyler, who has a three-year-old son with Langdon, said in in a statement to People magazine that the split was amicable.

“Liv Tyler and Royston Langdon have confirmed their separation. They remain good friends and devoted parents to their son Milo and are requesting that their family’s privacy be respected at this time,” the representative said.

Tyler, 30, is the daughter of Aerosmith frontman Steven Tyler. The actress will next be seen in action-hero blockbuster “The Incredible Hulk,” due to be released in US theaters next month.