Ella Molly Natalia Pettersson Hammar (born 16 October 1995), known professionally as Molly Hammar, is a Swedish singer and songwriter who participated in the talent show Idol 2011 broadcast on TV4, where she reached fourth place.

In the Quarter-Finals she sang Alicia Keys' "A Woman's Worth", she finished in the Top 12 and progressed through to the Semi-Final.

Hammar participated in Melodifestivalen 2015 with the song "I'll Be Fine", finishing sixth in the semifinal and being eliminated.

[3] She competed in Melodifestivalen 2016 with the song "Hunger", and qualified to andra chansen from the second semi-final before being eliminated.

[5] Molly Pettersson Hammar was previously in a relationship with singer Robin Stjernberg whom she met during her time at Idol, until 2015.