The former Xena: Warrior Princess star was among a group of Greenpeace campaigners who climbed aboard the vessel in Taranaki, New Zealand, on Friday (24Feb12) and chained themselves to the ship's tower to protest against oil drilling in the Arctic.
They spent four days onboard before they were removed by police on Monday (27Feb12) and subsequently arrested.
Lawless and her fellow protesters were charged with burglary and bailed to appear at New Plymouth District Court on Thursday (01Mar12).
In her final posts on Twitter.com prior to her arrest, the actress wrote, "We stand in solidarity with all who love the earth - let's Save the Arctic from Shell!... Seven of us came up the tower on Shell's drillship but 4 days later 130,000 will come down. In solidarity we can Save The Arctic."