Melbourne, Apr 17 (ANI): Rumours are abuzz that the mystery girl spotted hanging out with Mel Gibson on the beach in Costa Rica is actually opera singer Oksana Grigorieva, the former partner of James Bond actor Timothy Dalton.

According to Komsomolskaya Pravda, she had been waiting for Gibson to finalise his divorce from wife Robyn so they could be together.

However, Grigorieva''s publicist Victor Kruglov said he was not aware of any relationship, reports the Daily Telegraph.

Grigorieva has apparently split from Dalton several years ago and the pair has a 12-year-old son together.

The photos of Gibson with the mystery woman are said to have triggered Robyn''s decision to file for divorce last week, although she claims they''d been separated since 2006.

Robyn has filed for divorce in LA court citing "irreconcilable differences".

It is expected to be the most expensive divorce of Hollywood.