Bodog Beat

Sienna Miller is not afraid of a little airplane sexy time. (Courtesy Wikimedia)

A scarred eyewitness told London's Mirror that actress Sienna Miller and her boyfriend Rhys Ifans were getting down and dirty on a London-bound Virgin Atlantic flight.

"Their award-winning transatlantic performance (in the horror category) started from the moment we'd buckled into our Upper Class seats for the 7.30pm Virgin flight on Monday… And just as we thought things couldn't get any more stomach-churning, came a sight we wouldn't wish on our worst enemies. Rhys pulled off his wine-soaked top, exposing his scrawny white body, and squeezed into Sienna's bed for a snuggle. As it's only 33ins wide, that's some squeeze."

Miller and Ifans aren't the only celebs to join the mile high club. Reese Witherspoon and Jake Gyllenhaal are members. And who could forget when Ralph Fiennes who had unprotected sex with a flight attendant while en-route to and STD-awareness campaign with UNICEF? What a star.