In the scene, which you'll have no doubt seen by now, Tony Stark puts his daughter Morgan (Lexi Rabe) to bed.
is the reason why Morgan Stark says 'I love you 3000'. You've been warned! What does 'I Love You 3000' mean? The spoiler ban for Avengers: Endgame has now been lifted but as always, there will be major Endgame spoilers in this article.
