Anna Hansen Photo

Friday, June 5, 2009 at 11:25 pm

Anna Hansen and her Pro cyclist boyfriend, Lance Armstrong welcomed their newborn bay boy, Max Armstrong into the world Thursday night, and promptly announced the birth with a photo posted to Twitter.

He sent out the announcement shortly before midnight on Thursday, following up later with the pertinent stats: Max weighed in at 7 pounds, 5 ounces, and is 20 inches long.

Armstrong has three children with his ex-wife, Kristin, all conceived with frozen sperm and through in vitro fertilization because the cyclist had to undergo chemotherapy to treat testicular cancer. His reps confirmed that he conceived the baby with Hansen naturally.

After romancing a number of high-profile blondes including actress Kate Hudson, designer Tory Burch, and Sheryl Crow (he reportedly ended their engagement because her biological clock was ticking but he wasn’t ready to be a father again), he started dating Hansen last summer. They’ve settled in Aspen.

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