Born and raised in Wisconsin, Rebecca Sjöwall has been lauded for her dramatic power as an actress combined with a voice described as "luscious," "beautifully crisp," and "a powerhouse." Over five million gamers have heard her on the video games BioShock and BioShock 2 as the singer of the "Rapture Anthem".

The pop/rock band Sparks invited Rebecca to portray the sassy Hollywood Starlet on their album The Seduction of Ingmar Bergman, which was commissioned by Sveriges Radio and premiered on Swedish National Radio in August 2009. In 2011 she reprised her role for a sold-out live performance presented by the L.A. Film Fest at the Ford Amphitheatre in Hollywood. She reunited with Sparks on their latest album Hippopotamus, released by BMG on 8 September 2017. It has been met with critical acclaim and entered the UK album charts at No. 7.

Rebecca made her first appearance with Nashville Opera as the Williamson girl in David Lang's the difficulty of crossing a field in 2012. She returned to Nashville the following year to portray Mrs. P in Michael Nyman's The Man Who Mistook His Wife for a Hat. Of her portrayal, ArtsNash declared, "Her climactic singing scream of 'Philistine!' at Dr. S is one of the most electrifying moments I've experienced in more than 40 years of attending live opera and theater performances." In 2016 Naxos released a studio album of the opera, which was recorded at Ocean Way Nashville. That same year, Rebecca was once again in Nashville for a different role and opera, as Older Alyce in Tom Cipullo's Glory Denied.

Rebecca has performed with Arizona Opera, Festival Opera of Walnut Creek, Opera Idaho, Riverside Lyric Opera, Sacramento Opera, San Francisco Lyric Opera, West Bay Opera, and Pacific Opera Project (POP). Of her debut with POP as the Governess in Britten's The Turn of the Screw, Stage and Cinema wrote, "Her dramatic expression and stunning voice exhibit great beauty and power." She returned to POP in 2015 as Alice Ford in Verdi's Falstaff.

A frequent collaborator with composers, Rebecca made her Carnegie Hall debut in a world premiere concert piece by Stephen Edwards. She created two leading roles in two world premiere operas by Kenneth Wells, first as Anna Roosevelt in The First Lady ("an outstanding performance," - LA Weekly) and then as Professor Elyn Saks in The Center Cannot Hold. She also premiered In the Garrett, a song cycle by Christina Whitten Thomas, as well as several pieces by her husband, Marcus Sjöwall.

As a concert soloist, Rebecca has performed many of the great oratorios, including Verdi's Messa da Requiem, Brahms' Ein deutsches Requiem, Handel's Messiah, Vaughan Williams' Dona nobis pacem, and Beethoven's Symphony No. 9. She is also particularly fond of Swedish and English song and the music of Richard Strauss. She has given recitals in the United States, Japan, Latvia, and Sweden.

Rebecca took her first voice lesson while working on her bachelor's degree in political science at Luther College. She was planning a future studying law but first wanted to see the world, so she moved to Japan to work as an English teacher. While living in a small mountain town north of Kyoto City, a fellow teacher asked if she would give a concert to raise money for The Friendship Foundation. It was a life-changing experience. After returning to the U.S., she began studying music while working full-time (first at Harvard Business School and then Rolex). She eventually earned her master's degree in music from UCLA and then spent two seasons honing her craft as a studio artist with Arizona Opera.

As a two-time Society of Singers scholarship recipient, Rebecca was honored to open for Smokey Robinson at their 16th Annual ELLA Awards. She is a two-time District Winner of the Metropolitan Opera National Council Auditions as well as Winner of the American Jenny Lind Competition, the Long Beach Mozart Festival Competition, and the Redlands Bowl Young Artist Competition. Rebecca currently lives in Los Angeles.