She gained international fame during her teenage years as a member of the pop duo M2M with childhood friend Marion Raven.

Her third album, titled Spark was released in Norway, Denmark, Sweden and Finland on 18 November 2011, and in Germany, Austria and Switzerland on 16 December 2011.

[3] She became friends with Marion Raven at age five, and they formed their own band when they were eight, naming it "Hubba Bubba" after their favourite bubblegum.

Despite critical acclaim, their second album, The Big Room, did not perform as well commercially, and the duo broke up the year of its release.

Fan interest was reignited in 2004 and early 2005 when Larsen made several appearances in Norway, showing off a darker-haired image and new music with increased instrumental and lyrical scope.

Larsen performed three original songs, titled "This Time Tomorrow", "Recent Illusion", and "Walls", on NRK radio in October 2004, showcasing her skills at both guitar and piano.

The first single, "Don't Save Me", made radio impact on 3 January 2006, and quickly climbed into the top ten on many Norwegian charts and playlists.

Touted as "what many people consider to be the most eagerly awaited album of 2006" (according to Norwegian magazine, Plan B), the record debuted and peaked at No.

After Larsen's Spellemannprisen victories in January 2007, the album crossed the 40,000 copy mark, qualifying it for platinum certification.

[8] Concurrently with the release of "Under the Surface", Larsen participated in the "Lyd i mørket" charity concert series in early March 2006.

She then played in music festivals across Norway during the summer, and held a second Norwegian club tour starting in October 2006.

"Under the Surface" was released in India and Thailand in late 2006, and in November, "Don't Save Me" began to be played on MTV Asia.

Larsen also began making international appearances, performing at special events in Germany and Spain in September 2006, India in October 2006, and France in January 2007.

1 on the Norwegian singles chart in its first week of sales in August 2008, and was later nominated for the Spellemannprisen award as Hit of the Year.

On 24 October 2011, "Coming Home" was frequently played on the radio in the Philippines and was named the "Most Wanted Song Of The Month."

On 16 December "Coming Home" was performed by Marit Larsen on the finals of Idol Norge while Marion Raven was one of the judges on the same show.

On 14 July 2014, Marit premiered her single "I Don't Want to Talk About It" from the album When the Morning Comes on NRK P3 radio.

[13] Between 14 January and 14 February 2015, Marit Larsen played nineteen concerts on her "When The Morning Comes Tour" in Norway.

On 9 September 2016 the EP Joni Was Right II, which contains five tracks, was released on iTunes and other online music stores.

[23][24] Larsen married former international handball player, Alexander Buchmann in 2016 and they share a daughter named Astrid Ira.