Rosnes was born in Regina, Saskatchewan, and grew up in North Vancouver, British Columbia, where she attended Handsworth Secondary School.

[3] In 2023, Rosnes won her seventh Canadian Juno Award for Solo Jazz Album of the Year for Kinds of Love Smoke Sessions Records, recorded with Chris Potter on tenor, soprano saxes and flute, Christian McBride on bass, and Carl Allen on drums and Rogerio Boccato on percussion.

She married jazz pianist Bill Charlap on 25 August 2007, and the couple released a piano duet recording titled Double Portrait (Blue Note).

Guests included pianists Paul Bley, Joe Sealy and Oliver Jones, bassists Don Thompson and Michel Donato, trumpeters Guido Basso and Kenny Wheeler, and drummer Terry Clarke.

[9] The other members are Ingrid Jensen (trumpet), Alexa Tarantino (alto sax & reeds), Noriko Ueda (bass), Allison Miller (drums).