6.7 stars.
Let's start by saying this film is good in the way it evokes some emotions and sad moments regarding an 18 year old adopted teenage boy, who by the end of the film meets his biological parents. Kirk Cameron is his adoptive father etc. The roles are performed wonderfully, the music brings tears, it's a very gut wrenching (in a nice way) experience with all the intense drama. It has an inspirational side to it, not pushy or in your face for the audience, but there is talk of praying and God strewn about. You can tell the people are Christians. The red-headed best friend teenage boy is funny, adding good humor, which makes the story more authentic.
Now for the downside: the actual parents in the story would be about 38-42 years old (Cameron's character and his wife), but the actors are in their 50's and possibly early 60's. The biological mother would be literally 36 years old, not a day older (she gave birth to him at age 18). Unfortunately, the actress is in her 50's??!!! Rookie mistake guys. Nothing is more insulting to me than when a casting director brushes over something like this. It's shoddy, it's lazy, it's poor filmmaking. I always cut my ratings down when this happens, so instead of 7.5, "Lifemark" gets a 6.7. Unless a film is absolutely spectacular I can wink at this this error.