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16 December 2011, 13:53 | Updated: 16 December 2011, 13:57
The 'Otis' rapper is watching what he eats as a show of support his expectant wife.
Jay-Z has decided to adopt Beyonce's pregnancy diet in an attempt to offer his support to his expecting wife.
The rapper is maintaining a "partially vegan diet" as a show of solidarity with the Destiny's Child singer, a source close to the couple revealed.
Speaking to US Weekly, the source confessed: "Jay's trying to be disciplined, and he needs the energy to support her."
The couple are expecting their first child together in early 2012, and Beyonce has previously spoken about how she is trying to uphold a healthy eating regime over the course of her pregnancy.
The 'Countdown' singer recently told American news host Katie Couric on 20/20 that she is aiming not to lose control and also dismissed rumours linking her to odd cravings.
Jay-Z also spoke for the first time about becoming a father at a recent press conference in New York explaining he aims to instill his child with "character, integrity and morals".