Between 1943 and 1949, Cashin was under contract in Twentieth Century-Fox's "Glamour Division."  She designed costumes for over sixty films and received screen credit for the following:

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A Tree Grows in Brooklyn, 1944
Anna and the King of Siam, 1946
Behind the Silken Curtain
Billy Rose’s Diamond Horseshoe, 1945
Chair for Martin Rome / Cry of the City, 1948
Claudia, 1945
Claudia and David, 1946
Cluny Brown, 1946
Cry of the City, 1943
Eve of St. Mark, 1944
Fallen Angel, 1945
Give my Regards to Broadway, 1948
Home in Indiana, 1944
I was a Male War Bride, 1949
I Wonder Who’s Kissing Her Now?, 1947
In the Meantime, Darling, 1944
It Happens Every Spring, 1949
Junior Miss, 1945
Keys of the Kingdom, 1944
Kitten on the Keys / Do You Love Me?, 1946
Ladies of Washington, 1944
Laura, 1944
Mr. Belvedere Goes to College, 1949
Nightmare Alley, 1947
Northside 77
Off to Buffalo
Scudda Hoo! Scudda Hay! / Summer Lightning, 1948
Smokey
The Bullfighters, 1945
The Caribbean Mystery, 1945
The House on 92nd Street, 1944
The Iron Curtain, 1948
The Luck of the Irish, 1948
The Shamrock Touch
The Snake Pit, 1948
Three Little Girls in Blue, 1946
Unfaithfully Yours, 1948
Where Do We Go From Here?, 1945
You’re my Everything, 1949