AP Photo/Evan AgostiniMake that a bicycle built for four.
Lance Armstrong has welcomed a son with girlfriend Anna Hansen, their first child together and his fourth.
"Wassup, world? My name is Max Armstrong and I just arrived. My Mommy is healthy and so am I!" tweeted his champion cyclist dad Thursday evening.
Armstrong was kind enough to post a picture of the newborn online, as well. (Max is totally rockin' the hat look.)
Max was conceived via in vitro fertilization, just as were Armstrong's three children with ex-wife Kristin.
"Anna and I are thrilled to confirm that we are expecting in June and our families are ecstatic and grateful," the cancer-survivng, seven-time Tour de France winner said in a statement in December, when he confirmed they were expecting. "We are very much looking forward to what 2009 brings on many fronts. We appreciate respecting our privacy, as we are both eager to celebrate the holidays as a family."