London, May 1 : Cycling ace Lance Armstrong and girlfriend Anna Hansen are expecting their second child together - less than a year after the couple''s first child was born.

The sportstar, who has three kids with his ex-wife Kristin, announced the news in a post on Twitter. com. Armstrong created a separate account for the new tot, which he has nicknamed Cinco Armstrong, reports The Daily Express.

In a post on the baby''s Twitter. com page, Armstrong writes, "I got 2 arms, 2 legs, a nickname, and I''m 2 inches long. See y''all in October... I''m now the size of a lemon, 3.5 inches long, and weigh 1.5 ounces. And oh yeah, I''m on Twitter."

Armstrong also confirmed the news on his own Twitter page, saying, "Getting (questions) today about someone I''m following, a certain Cinco Armstrong. What to say? Yet another blessing in our lives. I cannot wait!"

The cyclist became a dad for the fourth time last June (09) when Hansen gave birth to little Max. (ANI)