Olivia Munn is the latest celebrity to shed her clothes for a PETA billboard. The actress attended the unveiling of her billboard, which encourages people to boycott the circus due to their mistreatment of elephants.

'As Nature Intended, Let Elephants Be Free. Boycott the Circus

The billboard is located in Los Angeles at Wilshire Boulevard and Highland Avenue.

What do you think of celebrities stripping down for these ads? Do you think it helps draw attention to the cause?

Do you think those boots are leather? I certainly hope not - being a PETA event and all!

Photos by WENN