Greenpeace activists including actress Lucy Lawless outside the Auckland District Court. (Greenpeace/AFP/Getty Images)

Lucy Lawless, best known for playing the fierce title character on “Xena: Warrior Princess,” pleaded guilty to trespassing charges Thursday, the Associated Press reports.

The actress was arrested in February for boarding a docked Shell-owned ship to protest drilling in the Arctic. Lawless and a few other Greenpeace activists spent 77 hours on a drilling tower before being detained, according to the New Zealand Herald.

On Twitter, Lawless said that the original charge of burglary was reduced to unlawfully being on a ship, a move she described as “superb.” According to the AP, she could be sentenced to up to three years in jail at a hearing in September.

Lawless told the Herald she thinks “we’ve helped kick off a great movement.” She told New Zealand’s 3 News she has “no regrets whatsoever. I’m really proud we stood up for what we know to be right.”