Quinn played the Teen with Pinups in Walk Hard: The Dewey Cox Story (2007), Esmee Johnson in The Sacrifice (2008), and Paula in My One and Only (2009).
Molly is 5' 4" (1.63 m) tall. She has natural red hair and blue eyes.
Her athletic skills include snow skiing, marksmanship, rock climbing, equestrian, gymnastics, rollerblading, aerobics, and swimming.
Among the accents Molly can speak with are Asian, British, Cockney, Middle Eastern, Midwest, Russian, Southern, and Texan.
She underwent six months of training in green screen, teleprompting, film work, comedy, and sitcom before signing with the Osbrink Agency in Los Angeles and with Ellen Meyer Management.
Molly is a skilled dancer and knows how to dance ballet, jazz, hip-hop, and tap.
She is of Irish descent.