Burnett was born in Littleton, Colorado. She has participated in school plays and musicals during her upbringing in Colorado.. She has a brother, Will and a father, David.
Burnett has always been interested in performing arts, ever since she belted out a song in the car at age three, to the shock of her parents. As she grew up, she joined the Denver theater community, taking on roles such as Hermia in A Midsummer Night's Dream, Mayzie in Seussical, Dotty in Noises Off, and as the lead character in the musical Annie.
In high school, she was not just the homecoming princess, she also joined her school's speech and debate team, where she competed in the humorous interpretation division and eventually went on to place at the national tournament.
Burnett was also a member of her school's elite jazz ensemble and was chosen to perform in the Colorado All-State Choir, the All-State Choir and the National Honor Choir in Los Angeles. Molly graduated with honors from high school and moved to New York City, where she attended Wagner College on Staten Island. Although her heart was in NYC, she realized that her dreams of acting in film and television would ultimately take her to Los Angeles.
She landed the Days of Our Lives role within a year of moving to Los Angeles. She had a small guest-starring role on the Good Luck Charlie episode called "Boys Meet Girls" in June 2010, as Madison, PJ Duncan's crush. On May 27, 2016, it was announced that Burnett would temporarily replace Kirsten Storms as Maxie Jones on General Hospital due to health reasons, she began to appear in early July.
Her mother, Katie, died of a lung illness on December 7, 2011. Molly has been dating model Spencer Neville since 2015.
In character as Amanda James on the HBO series True Blood, Burnett performed the song "Jesus Asked Me Out Today" during the show's second season in episode "Keep This Party Going". Burnett also sings each year at the Days of Our Lives fan event "Day of Days" with some of her fellow co-stars.
|2008||Days of Our Lives||Melanie Jonas||Main role from 2008–2012, 2014–15, 2016|
|2009||True Blood||Amanda Jane||Episodes: "Keep This Party Going" (#2.2), "May Be the Last Time" (#7.7; voice, uncredited)|
|2010||Good Luck Charlie||Madison||Episode: "Boys Meet Girls" (#1.11)|
|2011||The Key Man||Little Girl||Uncredited|
|2011||Venice: The Series||Sarah||Main role|
|2012||CSI: NY||Molly Byrne||Episode: "Slainte" (#8.16)|
|2013||Major Crimes||Kim Riley||Episode: "Jailbait" (#2.13)|
|2013–15||Jessie||Darla Shannon||Episodes: "GI Jessie" (#2.26), "A Close Shave" (#4.2)|
|2015||Longmire||Sarah||Episode: "Four Arrows" (#4.4)|
|2015||CSI: Cyber||Nina||Episodes: "Why-Fi" (#2.1), "Shades of Grey" (#2.10), "5 Deadly Sins" (#2.16)|
|2016||Ctrl Alt Delete||Lex||Post-production|
|2016||General Hospital||Maxie Jones||Temporary replacement for Kirsten Storms starting July 2016. to August 2016|
|2016||Relationship Status||Laura||3 episodes|
|2016||The Wedding Party||Lisa||Post-production|
In 2010, she was nominated alongside co-star Shelley Hennig for a Daytime Emmy in the Outstanding Younger Actress category. In the same year, she was nominated for an Indie Soap Award in the Best Guest Appearance category for the role of Lisa in Empire. In 2012, she was nominated again for an Daytime Emmy Award for Outstanding Younger Actress in a Drama Series.
|2010||Daytime Emmy Awards||Outstanding Younger Actress||Days of Our Lives||Melanie Jonas||Nominated|
|2012||Daytime Emmy Awards||Outstanding Younger Actress||Days of our Lives||Melanie Jonas||Nominated|