Seems like George Clooney is serious about this marriage thing!

Los Angeles - George Clooney and Amal Alamuddin have obtained their marriage licence.

The couple, who got engaged in April and are tipped to exchange vows at his lavish estate in Lake Como, Italy next month, attained the legal document at Chelsea Town Hall in London, enabling them to make their union official.

The Gravity star's name on the licence, which was reportedly unveiled on a piece of paper behind a glass cover outside the town hall for all to see, reads George Timothy Clooney, while the British lawyer's is listed as Amal Ramazi Alamuddin, according to Dlisted.com.

It was recently claimed that George, 53, wants to hire Born to Die hitmaker Lana Del Rey to perform at his wedding because 36-year-old Amal, who celebrated her bridal shower in New York City last month, is such a big fan.

A source said: "Amal is a massive fan of Lana's, which has made George determined to make this happen.

"He contacted Lana's people to see if she'll perform at their wedding in Italy."

The Monuments Men actor previously insisted he was very lucky to be marrying the human rights lawyer.

He said: "I'm marrying up."