Beyonce Knowles — who still won't admit that she's married to hip-hop mogul Jay-Z — is pregnant, sources told the New York Post's Page Six gossip column.

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

A rep for Beyonce told Page Six, "I don't know if she's pregnant. Let me perform an ultrasound and get back to you."

An insider also reportedly told Life and Style magazine that Beyonce is pregnant.

"She's thrilled and ready to be a mother," the insider said, adding that the stars got married last month so they could do so "before she started showing."

Beyonce, 26, and Jay-Z, 38, are widely reported to have married on April 4.

Click here to read more in Page Six