Rebecca Sinclair (Previously credited as Rebecca Rand Kirshner Sinclair and Rebecca Rand Kirshner and Rebecca Kirshner) is a writer and producer for American television. Currently, she is the showrunner for the television series 90210. She served as co-executive producer on the CW series Gilmore Girls. She lives in Los Angeles, California. In 2009, Sinclair signed a deal with CBS productions to stay on board as showrunner of 90210 until its third season in 2011.
She is the daughter of Harvard University astrophysics professor Robert Kirshner and the great-granddaughter of William Rand.
She married New Zealand filmmaker and musician Harry Sinclair in December 2008.