Cara Delevingne Celebrates 30th Birthday with Star-Studded Boat Day Including Margot Robbie & More (Photos)

Adwoa Aboah playfights with Cara Delevingne as she celebrates her 30th birthday on a yacht in Spain

Margot Robbie celebrates her pal Cara Delevingne's 30th birthday at a yacht party in Spain

Lady Mary Charteris shows off her impressive abs in an orange bikini at Cara Delevingne's birthday