Here is the picture that proves everything. River made a tweet (you can see it down) along with this picture!
It's this is real since Sara retweeted that too. They are a couple.
For the ones who don't know him I decided to make this post with some pictures of him.
He's a spainsh male model whom is ranked 32th in the list of Top 50 Male Models.
He made campaigns for American Eagle (where this picture are from), Armani Exchange, Bershka, Calvin Klein, Versace, Ralph Lauren, Tommy Hilfiger
He walked in several fashion shows such as Calvin Klein, DKNY, D&G, Ermannno Scervino, Frankie Morello, Versace, Jeremy Scott, Desigual (where these two last pictures and gif are from)
So, what you think about him and the new couple?