Credit: Instagram

It's that time of the year again!

Teen Mom's most adorable couple, Catelynn Lowry and Tyler Baltierra, are hot off the heels of a yearly visit with their daughter Carly, who they placed for adoption during MTV's 16 and Pregnant. This dynamic duo have an "open adoption" with Carly's parents, Brandon and Teresa Davis, which means they get letters, emails, phone calls, and even the occasional visit with their little lady.

You can imagine how excited Cate and Ty get about these face-to-face hang sessions, and it looks like their most recent trip to see Carly was the best yet.

"WOW! I haven't felt this happy in SO long!" Tyler tweeted on September 1. "Playing tag, racing & swinging with Carly is the highlight of my my life right now! #4yearvisit."

Meanwhile, Catelynn expressed her excitement about seeing Carly, tweeting "Well today's the day!! Going to see my little lady!! Carly we love u so much so excited to see you!!!"

Awww, we're so happy that Catelynn and Tyler got to see their daughter! Of course, Brandon and Teresa are super protective of Carly's privacy (which makes complete sense considering that Cate and Tyler are reality television stars), and likely won't agree to them posting pics of this visit online. But we don't need pictures to know that they had an amazing time! Cate and Ty even took Carly the the zoo, and they couldn't be happier with their decision to place her with Brandon and Teresa.

"It's always surreal seeing her live the life me & @CatelynnLowell chose for her," Tyler reflected. "If anyone deserves that life it's that Angel."

Sadly, Catelynn and Tyler won't get another chance to see Carly until 2014 — unless they get hitched and can convince Brandon and Teresa to bring their kiddo to the wedding!