On November 30, 2012, it was announced that The Pretty Reckless' fourth single "Kill Me" would be released on December 11.
In October 2010, Momsen wore a pair of platform stilettos, thigh-high stockings, and had a holster strapped around her leg for Revolver.
Two months after she covered French magazine Rock One's.
Beginning in 2007, she played the character of Jenny Humphrey in The CW television series Gossip Girl, which is based on the book series by Cecily von Ziegesar.
Momsen's appearances on the series became increasingly sporadic, and by the end of the first half of the fourth season, she had only appeared in four episodes.
However, on October 16, 2012, it was reported that Momsen and Connor Paolo, whose recurring role as Momsen's stepbrother had also been significantly decreased following the fifth season, would be returning to Gossip Girl for the final episode of the sixth and final season.
Momsen's character Jenny Humphrey appeared briefly in the wedding sequence at the end of the final Gossip Girl episode.She also auditioned for the title role in Hannah Montana, and was in the top three, but the role was instead awarded to Miley Cyrus—a decision that Momsen was happy with in retrospect.In 2007 she starred in the Walt Disney Pictures film Underdog, as Molly and as Jennifer in the movie Paranoid Park, directed by Gus Van Sant.The band's debut album Light Me Up was released on August 30, 2010 in the UK, where it debuted at number 6, as well as at number 18 in Ireland.The first single "Make Me Wanna Die" was released on May 30, 2010, while the second single "Miss Nothing" which was released on August 23, 2010 peaked at number 39.Montag released the song as a digital only single, with the music video being directed by her husband Spencer Pratt.