did he marry her?
Yes
Marriage and family
Cooper was formally introduced to his future wife, 20-year-old New York debutante Veronica Balfe, on Easter Sunday 1933 at a party given by her uncle, art director Cedric Gibbons.
is gary cooper an actor? Yes from which origin? Helena, Montana, United States what is his style like? Natural, authentic, and understated acting style with whom he was in relation? Veronica Balfe
Yes, on December 15, 1933. Yes Yes
Gary Cooper Gary Cooper Gary Cooper
Marriage and family Marriage and family Marriage and family
Her stepfather was Wall Street tycoon Paul Shields. Cooper and Rocky were quietly married at her parents' Park Avenue residence on December 15, 1933.  Cooper was formally introduced to his future wife, 20-year-old New York debutante Veronica Balfe, on Easter Sunday 1933 at a party given by her uncle, art director Cedric Gibbons.  Cooper was formally introduced to his future wife, 20-year-old New York debutante Veronica Balfe, on Easter Sunday 1933 at a party given by her uncle, art director Cedric Gibbons. Called "Rocky" by her family and friends, she grew up on Park Avenue and attended finishing schools. Her stepfather was Wall Street tycoon Paul Shields. Cooper and Rocky were quietly married at her parents' Park Avenue residence on December 15, 1933. 
wiki:11629432
Gary Cooper [SEP] Marriage and family
Cooper was formally introduced to his future wife, 20-year-old New York debutante Veronica Balfe, on Easter Sunday 1933 at a party given by her uncle, art director Cedric Gibbons. Called "Rocky" by her family and friends, she grew up on Park Avenue and attended finishing schools. Her stepfather was Wall Street tycoon Paul Shields. Cooper and Rocky were quietly married at her parents' Park Avenue residence on December 15, 1933. According to his friends, the marriage had a positive impact on Cooper, who turned away from past indiscretions and took control of his life. Athletic and a lover of the outdoors, Rocky shared many of Cooper's interests, including riding, skiing, and skeet-shooting.