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.

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Filed under: Celebrities, Sienna Miller