JUSTIN BIEBER's mom has added her support to a new short film about pro-life by becoming an executive producer and appearing in promotional ads.

Pattie Mallette, who fell pregnant with the pop superstar when she was just 17, has given Crescendo two thumbs up because she believes the film will offer encouragement to other young expectant mothers.

She says, "I hope the film will encourage young women all over the world, just like me, to let them know that there is a place to go, people who will take care of you and a safe home to live in if you are pregnant and think you have nowhere else to turn."

The short film stars actress Ali Landry and is directed by Alonso Alvarez.