It looks like Lance Armstrong is gonna need a tandem bicycle ... 'cause the dude's gettin' hitched!!
The cyclist announced the engagement to his longtime girlfriend, Anna Hansen, with a romantic pic on the lake Tuesday, saying "she said..... YES!!!!"
Armstrong and Hansen have been dating for nearly 10 years and have 2 kids together -- Max (7) and Olivia (6).
Armstrong has dated famous women in Hollywood over the years. He was in a relationship with Kate Hudson, and was even engaged to Sheryl Crow ... before meeting Anna.
No word yet on a date and place for the big wedding.