US actor George Clooney (L) and his wife British-Lebanese lawyer Amal Clooney pose as they arrive for the 42nd edition of the Cesar Ceremony at the Salle Pleyel in Paris on February 24, 2017. / AFP PHOTO / THOMAS SAMSON

Actor George Clooney and Amal Clooney arrive at the 42nd Cesar Film Awards ceremony at Salle Pleyel in Paris, Friday, Feb. 24, 2017. This annual ceremony is presented by the French Academy of Cinema Arts and Techniques. (AP Photo/Francois Mori)

United Nations, New York, USA, 10 March 2017 - Amal Clooney Meets with Secretary-General Antonio Guterres today at the UN Headquarters in New York. Amal Clooney, is the Legal Representative for Nadia Murad Basee Taha and other Yazidi survivors and she is at UN to ask for justice for her clients. (Photo by Luiz Rampelotto/EuropaNewswire) *** Please Use Credit from Credit Field ***

Amal Clooney arrives to meet with Secretary-General of the United Nations, Antonio Guterres at the UN Headquarters on March 10, 2017 in New York. / AFP PHOTO / ANGELA WEISS

US actor George Clooney poses on May 12, 2016 during a photocall for the film "Money Monster" at the 69th Cannes Film Festival in Cannes, southern France. / AFP PHOTO / ANNE-CHRISTINE POUJOULAT

British-Lebanese lawyer Amal Clooney poses on May 12, 2016 as she arrives for the screening of the film "Money Monster" at the 69th Cannes Film Festival in Cannes, southern France. / AFP PHOTO / ALBERTO PIZZOLI

US actor George Clooney (R) and wife Amal Clooney attend a Leaders Summit for Refugees during the United Nations 71st session of the General Debate at the United Nations General Assembly at United Nations headquarters in New York City, NY, USA, September 20, 2016. Photo by Peter Foley/Pool/ABACAPRESS.COM

Amal Clooney and George Clooney pose for photographers upon arrival for the screening of the film Money Monster at the 69th international film festival, Cannes, southern France, Thursday, May 12, 2016. (AP Photo/Joel Ryan)

US actor George Clooney (L) kisses his wife, British-Lebanese lawyer Amal Clooney as they leave on May 12, 2016 the Festival Palace after the screening of the film "Money Monster" at the 69th Cannes Film Festival in Cannes, southern France. / AFP PHOTO / LOIC VENANCE

George Clooney (actor) with his wife Amal Clooney attends the "MONEY MONSTER" Premiere during the 69th annual International Cannes Film Festival in Cannes, France, 12th May 2016. Credit: Timm/face to face fot. Face to Face/REPORTER

Amal Clooney and George Clooney attend the screening of 'Money Monster' at the annual 69th Cannes Film Festival at Palais des Festivals in Cannes, France (Photo by Elyxandro Cegarra/Pacific Press) *** Please Use Credit from Credit Field ***

US actor George Clooney (L)and his wife Amal Clooney arrive on May 12, 2016 for the screening of the film "Money Monster" at the 69th Cannes Film Festival in Cannes, southern France. / AFP PHOTO / Valery HACHE

George Clooney and Amal Clooney attending the "Hail, Caesar!" opening Premiere during the 66th Berlinale Film Festival Berlin, Germany. Berlin, 11.02.2016. Credit: Timm/face to face fot. Face to Face/REPORTER