Lance Armstrong and Girlfriend Welcome a Daughter

NEW YORK (CBS) Lance Armstrong is a dad for the fifth time.

He and girlfriend Anna Hansen welcomed a baby girl, the seven-time Tour de France champ announced on his Twitter account.

Pictures: Celebrity Babies
Pictures: Lance Armstrong

"Olivia Marie Armstrong has arrived!" he wrote early Monday morning. "Thanks to you all for the support and well wishes. Momma and Olivia (@Cincoarmstrong!) are doing great. She's a beauty!"

The @cincoarmstrong Twitter account also posted a message Monday, saying, "Well, I made it out! What's happening? Sleeping.."

This is Armstrong's second child with Hansen. The two welcomed son Maxwell Edward on June 4, 2009. Armstrong also has twins Isabella and Grace, 8, and son Luke, 11, with his ex-wife, Kristen.