[4] She and her brother Joey[5] are the children of Karen, a school aide, and Carl Blonsky, a municipal worker for the village water pollution control district.

Shine Great Neck South High School daily, where she participated in productions of Les Misérables, Sweeney Todd, Kiss Me, Kate, and the title role of the opera Carmen.

In 2010, Blonsky co-starred with Raven Goodwin in the short lived ABC Family series Huge, which premiered in June 2010,[20] and ran for one season.

[22] In 2011, Blonsky earned a cosmetology license, and began working part-time as a hairstylist and make-up artist in her hometown of Great Neck, New York, between acting auditions.

In July 2008, Blonsky and her parents were involved in a violent confrontation with the family of Bianca Golden, a former contestant on America's Next Top Model, at the Providenciales International Airport in Turks and Caicos.

[31] In June 2020, Blonsky came out as a lesbian in a video posted to the social media site TikTok set to the song "I'm Coming Out" by Diana Ross.