These two are serious!

Justin Bieber, 17, just sent out this pic of himself and ladylove Selena Gomez, 19, on his Instagram account, with the caption, "Brangelina 2.0 ... "

Yowza! Bieber said only a few weeks ago that he wants to be a "young dad." But Justin and Selena have only been together since earlier this year!

Ah, young love ... full of possibility. See another newly-Tweeted pic of Justin and Selena after the jump!