Solange Piaget Knowles (born June 24, 1986) is an American singer, songwriter, model, and actress. Knowles was born in Houston, Texas to Mathew and Tina Knowles, both of whom left their careers to support her older sister Beyoncé's recording interests. Expressing an interest in music from an early age, Knowles had several temporary stints in Destiny's Child, before signing with her father's Music World Entertainment label. Aged sixteen, Knowles released her first studio album Solo Star (2003) to moderate commercial and critical success.

In 2004, Knowles married Daniel Smith, eventually giving birth to their son Daniel Julez J. Smith Jr., which prompted a move to Idaho. Between 2005 and 2007, Knowles had several minor acting roles, including the direct-to-video Bring It On: All or Nothing (2006) and continued writing music for Beyoncé and ex-Destiny's Child band members Kelly Rowland and Michelle Williams. In 2007, Knowles divorced Smith and moved to Los Angeles, California, beginning to write and record music again. Her second studio album Sol-Angel and the Hadley St. Dreams (2008) deviated from the pop-oriented music of her debut to the Motown Sound of the 1960s and 70s. It peaked at number 9 on the Billboard 200 and received positive reviews from critics. She followed this up with the 1980s pop/R&B-inspired extended play True (2012) and intends to release her third studio album in the future, on her own label Saint Records.

Knowles is heavily influenced by Motown girl groups and says that her first passion is songwriting. She has been recognised as a fashion icon and has received frequent comparisons to sister Beyoncé from the media, although insists they have different aspirations and are musically different. Her other ventures include an endorsement deal with Rimmel London and a line of hip-hop-oriented merchandise for young children, which was inspired by her son.

On November 16, 2014, Knowles married music video director Alan Ferguson in New Orleans, Louisiana.