Madonna's teenage daughter is reportedly dating a young Homeland star.

Lourdes Leon, 16, attends the Fiorello H. LaGuardia High School of Music & Art and Performing Arts in New York City. She has apparently struck up a relationship with Timothée Chalamet, who portrays the son of Vice President Walden on the American CIA TV show.

"It's common knowledge at the school that the pair are dating," an insider told New York Post.

Timothée is due to graduate this year, while Lourdes will finish her studies in 2014.

His Homeland character is called Finn and was involved in a major storyline in series two, when he ran over and killed a pedestrian while driving at high speeds and neglected to stop.

Madonna's representative hasn't commented on the romance rumours and neither has Timothée's spokesperson.

The music icon had Lourdes with personal trainer Carlos Leon, who is regularly seen out and about with his daughter.

Two years ago he discussed how fatherhood has affected him, admitting he was unsure how he'd cope when his daughter started dating.

"I'm dreading it... because she's my little girl. I want her to stay young forever," he said. "I'm already overprotective, so when the time comes, I will be ready to have a talk with the guy she brings through the door. He better be ready, because I'll give him the rundown."

Madonna, 54, has previously joked about imposing romance rules on her daughter. She once grimaced in an interview when quizzed on whether Lourdes was interested in boys and also insisted she should stay single for some time.