Beyonce Knowles is reportedly pregnant with her first child.

The 'Halo' singer - who is married to hip-hop superstar Jay-Z - was said to be shocked when she discovered she was expecting, but is now thrilled with the news.

A source told Us Weekly magazine: "B was shocked. She loves kids, but she wasn't ready to be a mother just yet. She really wanted to get her album done and tour the world again."

Another insider added: "She now knows this is a gift from God and she's so happy."

Friends of the couple - who married in 2008 - have expressed their delight at the news, saying they will make wonderful parents.

Record executive Kevin Liles - a close friend of Jay-Z - said: "Jay has been all about family since I met him, and he's always going to be. I wish them the best."

Beyonce's sister Solange added: "She's got the most beautiful heart. She'll be a great mom."

In 2008, Beyonce said she "isn't ready" to have children.

The 29-year-old beauty revealed: "I know I want kids but I have never been a girl who sees a baby and goes, 'Oh! I want one!' But when I do eventually have a child, I can only pray he is as amazing as my nephew Jules. He's just the best. He is also a lot of work!

"I've seen the reality of having a kid and I know I'm not quite ready for it yet."