Pamela Anderson ran the NYC Marathon with her brother

The 46-year-old actress completed the grueling 26-mile race with her brother, Gerry, on Sunday, and raised $75,864 for actor Sean Penn's charity, the J/P Haitian Relief Organisation.

The former Playboy Playmate told ESPN: "For a second I did entertain the thought. I had friends ask me to [wear it]. They think it would be really funny. The bad thing was, I did think twice about it!"

Pamela, who walked and ran, was elated after completing the marathon and tweeted a picture of her and Gerry at the finish line with the message: "So proud of my brother Gerry. Thank G. For running next to me today - love you lots (sic)."

The actress announced her plan to run the race in September after being approached by her close friend Sean to help raise $500,000 for his charity, which aims to save lives and bring sustainable programs to Haiti as it continues to recover from the 2010 earthquake.

Pamela confessed she is in the best shape of her life after training for the race.

She said: "I never worked out in the 'Baywatch' days. Now it feels so good, I'm like, 'Why wasn't I doing this for the last 20 years of my life?' But everything happens for a reason and I'm actually glad that, at this time and this age, I'm exercising. I'm not sure what else would have gotten me to exercise."