Sean Penn, Scarlett Johansson End Their Intense Fling 1The unlikely May-December romance between Scarlett Johansson and Sean Penn is over after a whirlwind fling that began when they turned up in Cabo San Lucas together after being spotted a number of times around Los Angeles.

The cause of the break-up is unknown at the moment, but a source has reportedly confirmed the split to People.

Competing schedules that took them to different parts of the globe and threatened an extended period apart may have caused the relationship to wane.

Johansson, 25, is working on her new film “The Avengers,” a remake of the classic ’60s television show in New Mexico.

Penn was at the Cannes Film Festival to promote his movie “The Tree of Life,” and Johansson did not make the trip.

The pair were a confirmed couple after the attended the White House Correspondents’ Dinner party together in Washington D.C. in April.

The two raised eyebrows at the event when the two became engaged in an “intense” makeout session during the dinner, US magazine reported at the time.

“It happened right as the main course of the dinner was being put on the table,” the witness says, adding that Johansson sat in Penn’s lap during part of the meal.