Where is the scene with Lily Potter from that's at the very beginning of the deathly hallows part 2 trailer?

Is that scene in this movie or from previous movie, because I don't remember seeing it (I'm talking about the scene with Harry's mom saying "Harry be safe, be strong."Where is the scene with Lily Potter from that's at the very beginning of the deathly hallows part 2 trailer?
That's in part 2 when Harry was looking at snape's memories in the pensive - very emotionalWhere is the scene with Lily Potter from that's at the very beginning of the deathly hallows part 2 trailer?
I'm pretty sure it's in Part 2, during the part when Harry is going through Snape's memory, and it's right before she's killed by Voldemort.Where is the scene with Lily Potter from that's at the very beginning of the deathly hallows part 2 trailer?
That scene is a flashback, and it's taking place moments before Voldemort kills Harry's Parents when he was a little baby.
You know, I think it was in part 2 wen he's looking through Snape's memories. Remember? I cried:)