Sienna Miller's Bikini Malfunction Nip Slip Photo

Sienna Miller was reportedly sunning on a Malibu beach over the weekend with a girlfriend when she headed for the water in order to cool off. Her skimpy tube bikini top headed south - exposing the breasts of the actress.

She immediately righted the situation and headed back to dry land - as captured by a member of the every vigilant paparazzi. She was spotted later that day with boyfriend Rhys Ifans. The couple enjoyed a sushi meal at Nobu in Malibu.

Daily Mail has the full view nip shot of the actress and another as she tugs her bikini top back over her breasts.

It has happened again--this time on Live With Regis and Kelly - check it out here.