Frequently cast as the romantic lead, he starred in silent movies as well as in some of the first talkies.

[citation needed] Born in Fordstown Crossroads in May 1883 , County Meath, Moore, along with his brothers, Owen, Matt, and Joe, and their sister Mary (1890–1919), he emigrated to the United States as a steerage passenger on board the S.S. Anchoria and was inspected on Ellis Island in May 1896 .

While in New York City on New Year's Eve 1920, Moore met the young French actress Renée Adorée.

A whirlwind romance ensued and six weeks after their meeting, on February 12, 1921, they were married at his home in Beverly Hills.

[3] The Great Depression saw many studios close and much consolidation as the motion picture industry went through tough times.