The 44-year-old star, who received award in Choice Movie: Drama category, for the film "Miracles From Heaven," attended the event to accept the honour with her young co-star Kylie Rogers, 12, reported People magazine.
"Thank you, this is for this little lady. That's for you baby. Thank you so much. Thanks to everyone, we were definitely the underdog in this category. That's so exciting," Garner said.
"All the kids who are in a hospital waiting for a miracle, don't give up hope!"
Directed by Patricia Riggen, "Miracles From Heaven" is a story of a young girl, Anna (Rogers), who has a rare incurable disorder and her mother Christy (Garner) searches out for ways to save her life.