Beyonce Knowles, who married Jay-Z last month, is pregnant according to the singer's friends.

The 'Dreamgirls' actress and former Destiny's Child singer has allegedly been eating all her favourite foods since discovering the pregnancy, reports Female First.

"She has gained a lot of pregnancy weight. When she gains weight, she normally does the Def Jam detox, but not now," a friend said.

Speculation that the singer is expecting her first child mounted when she was seen in New York with what seemed to be a baby bump.

"I've heard from at least two people that Beyonce is pregnant," another friend claimed.

It had previously been claimed that Knowles and Shawn Carter (Jay-Z's real name) rushed forward their wedding date as the 'Dangerous In Love' singer didn’t want her baby bump showing during the ceremony.

The couple have yet to officially confirm that the wedding took place.

Last year she claimed she wouldn’t pressure Carter into starting a family: "You can't rush a man into anything whether it's a relationship, marriage or having children. When he's ready he'll let you know."

After the couple's wedding in April, actress Vivica A. Fox suggested they could have children soon: "I wish them many, many years of happiness and some babies. I think she will be really pretty pregnant, just like Jennifer Lopez and Halle Berry."

But Knowles' former Destiny's Child bandmate Kelly Rowland has dismissed the pregnancy reports: "You know what's funny about this, all three of us (Destiny's Child members) have been pregnant at one time. We were on stage and supposedly we looked pregnant!

"I think that it happens, people say that all the time and there are so many rumours about a wedding, so many rumours about so much stuff that it (Beyonce being pregnant) is probably next in line.

"I mean, even before (there were) the wedding rumours (there) were baby rumours; before the wedding rumours there were wedding rumours, you know what I mean? So, no, there's no truth to that. She would be mad, she'd be like: 'I'm what?'"