Actress Bianca Lawson and singer Beyoncé are not biologically related but they are stepsisters.
Beyoncé and Solange Knowles were born to Mathew Knowles and Tina Lawson (former surname Knowles) in 1981 and 1986 respectively. Tina divorced Richard in 2011. Richard and Tina began their courtship in the summer of 2013. Tina and Richard married in 2015, making Bianca a stepsister to Beyoncé and Solange Knowles.