Collier's acting career started in 1938, when she had a small but credited role in A Desperate Adventure, starring Ramon Novarro and Marian Marsh. From 1940 through 1949, her career would be active and somewhat successful, with her playing mostly heroine roles in B-movies. During that period, she often starred opposite western stars Bob Steele, Tom Tyler, and Dennis Moore. In 1950, she starred in the sci-fi serial The Flying Disc Man from Mars.
Collier was sometimes called the Fourth Mesquiteer because seven of Republic Pictures' The Three Mesquiteers movies featured her as the female lead. Collier played Carol in the soap opera Dear John, which ran on CBS in the 1930s and 1940s. Beginning December 6, 1948, she was featured in You, a program on KMGM in Los Angeles, California.
In 1949, Collier co-starred in City Desk, a drama about activity in the newsroom of a newspaper. From 1950 through 1957, she starred mostly on television series episodes. She played Mary, the hero's girlfriend and sidekick, in 58 episodes of the television series Boston Blackie, which ran from 1951 to 1954. She retired from acting after 1957.
1958
as Helen
1956
as Pamela Courtney
1955
as Lady Elaine
1951
1951
as Betty Parker
1950
as Helen Hall
1950
as Fluff
1950
as Anne Howe Palooka
1949
as Alice Forrester
1948
as Ginny Powell
1948
as Margaret Bixby
1947
as Aleta
1946
as Linda Gibson
1946
as Gay Elliot
1946
as Annette
1946
as Kathy Lorenz
1945
as Jean Walker
1945
as Linda Reynolds
1945
as Miss Caroline Jackson
1945
as Pamela Courtney
1944
as Joan Fletcher
1944
as Veeda
1944
1944
as Margaret Mercer
1944
as Jill Romilly
1943
as Eileen Crane
1943
as Co-ed (uncredited)
1943
as Doris
1943
as Claire Robbins
1943
as Nancy Cavanaugh
1942
as Judy Barrett
1942
as Anne Henderson
1942
as Receptionist
1942
as Jean Travers
1942
1942
as Coed
1941
as Doris Conway
1941
as Ellen
1941
as Pretty Brunette (uncredited)
1941
as Doris Sheldon
1941
as Audition Girl
1940
as Road Girl (Uncredited)