Lance Armstrong Welcomes Baby No.5, Olivia Marie

Lance Armstrong became a father for the fifth time this week when his girlfriend Anna Hansen gave birth to a baby girl. Armstrong, 39, announced baby Olivia’s birth early Monday morning on Twitter.

“Olivia Marie Armstrong has arrived!” the Tour de France champ — a testicular cancer survivor –wrote.

Prior to making her big debut, Olivia amassed more than 3,000 followers on Twitter when dad Lance set up an account for his then-unborn daughter under the Twitter name CincoArmstrong.

The CincoArmstrong page was launched back in April, with a message that read: “I got 2 arms, 2 legs, a nickname, and I’m 2 inches long. See y’all in October.”

Olivia is the second child for Armstrong and Hansen. The couple welcomed their first child, son Max, in June 2009. Armstrong also has an 11-year-old son and twin daughters, age 8, with ex-wife Kristin Richard.