Lourdes Leon may only be 14, but she was looking very grown-up and in the lead when we spotted her with her mom Madonna at London's Heathrow Airport Sunday morning.

The two, along with Lourdes' younger half-brother Rocco Ritchie, were flying home from the Venice Film Festival where Madonna's new film W.E. -- Madge directed the Wallace Simpson biopic -- was savaged by critics and audiences alike.

PHOTOS:  Lourdes Leon Travels With Mom Madonna After Nightmare At Venice Film Festival