Sean Penn and Maria Conchita Alonso are just like their characters in 1988's Colors -- still holding grudges against each other after all these years.

Remember when Penn's cop character (Pac-Man!) walks in on his girlfriend (played by Alonso) at the end of the movie, only to find out she's a prostitute? (Either that or very friendly with about every member of that gang.) Wow, drama city. Poor Pac-Man.

Things haven't improved much in the year 2011, when Penn and Alonso ran into each other at Los Angeles International Airport on Sunday. Alonso's been railing publicly about Penn's support of Venezuelan President Hugo Chavez, and things boiled over from there.

"I was very calm," Alonso recalled, according to E! Online. "I said, 'I would like to talk to you.' He said, 'Oh, it's you. I have nothing to say to you. You speak badly about me.' I said, 'No, I don't. I just say the truth. That you are a friend of Chavez and that he's a good man. And that's a lie. How can you do that?' "

So far, so good ... well, so awkward. But then...

"He said, 'You are a pig!' " continued the actress. "So I said, 'And you are a Communist a--hole!'

THERE we go. Read the full account on E! Online. Don't expect them to record an audio commentary for their flick anytime soon. And remember, no wearing blue or red colors in L.A.