While it was an exciting step in her life and career, it wasn’t without sadness: for one, it meant having to be apart from her beloved old dog, Buddy.

Buddy was a 13-year-old golden retriever. The two had grown up together.

“She’s very old and has arthritis and is mostly deaf,” Hannah told Buzzfeed. “But I still remember getting her as a puppy.”

“It pulled at my heartstrings, to say goodbye, though having never actually left home before I didn’t realize the importance of giving proper goodbyes,” she told Today.

But after three months apart, Hannah returned home for the holidays… and no one was more excited to see her than her old dog.

“We opened the front door and she came running out and greeted me and my family, but then kind of did a double take and came back to me,” she told Buzzfeed.

“She was completely overwhelmed and she couldn’t even stand up.”

Buddy was so overwhelmed with joy that she collapsed in Hannah’s lap, just wanting to be close with his old friend.

“She just collapsed in pure happiness,” Hannah told Today. “She just wanted me to hug her and reaffirm that I was actually there.”

Watch the heartwarming reunion:

That video has gone viral, gaining nearly 7 million views on YouTube.

It was a beautiful reunion—and that was only the beginning: the old dog really perked up during Hannah’s visit home.

“My parents were so astonished by how happy she was during my time at home,” Hannah told Buzzfeed.

“She normally has trouble going up and down the stairs and takes shorter walks, but now that I was home she was so happy and active. She would get up and do her happy dance.”