In 2009, Billingsley started well, winning his first five decisions and posted a 7 inning, 11 strikeout performance against the San Francisco Giants on April 13. On July 5, 2009, Billingsley hit his first career home run off Josh Banks in a 7–6 Dodgers win against the San Diego Padres. He was selected to the 2009 National League All-Star Team. However, he struggled in the second half of the season and finished the year 12–11 with a 4.03 ERA in 32 starts and pitched out of the bullpen in the playoffs.