Pop star Beyonce, 35, is expecting twins with her rapper husband Jay-Z, 47, she announced on Instagram on Wednesday. The pair "have been blessed two times over," she wrote. "We are incredibly grateful that our family will be growing by two, and we thank you for your well wishes," she wrote. The message was posted with a photo of Beyonce in underwear clasping her swollen belly. She is wearing a long see-through veil and is posed in front of a large floral arch. The couple, who have been married since 2008, already have a daughter, Blue Ivy, 5, who was born in New York in 2012. Beyonce announced she was pregnant with her first child while on stage at the 2011 MTV Video Music Awards. After wowing the crowd with a performance, she unbuttoned her sequined jacket and rubbed her stomach. Born and raised in Houston, Beyonce shot to fame as a member of the girl group Destiny's Child before going solo in 2003. She leads the field of 2017 Grammy nominees with nine nominations off her album "Lemonade." The awards will be handed out on February 12.