Jennifer Aniston sure does have a lot of reasons to celebrate.

The actress rings in her 49th birthday on Sunday, just days ahead of celebrating Valentine’s Day with husband Justin Theroux.

The occasion marks another busy year for the couple — Aniston recently signed on with Reese Witherspoon for a new Apple TV series, while Theroux filmed the comedy The Spy Who Dumped Me in Budapest.

“They have figured out a life that works for them,” a source previously told PEOPLE of the couple that married in 2015. “Jennifer’s life with Justin is great.”

A second source said the distance helps them appreciate the time they do have together even more.

“This has not hurt their marriage at all, it seems to help,” an entertainment source previously told PEOPLE. “They love and respect each other and do spend a lot of time apart. For them, it is a healthy part of their romance.”

Added the first source: “By not spending every minute together, it’s like their honeymoon is lasting longer.”

But when they aren’t working, Aniston and Theroux, 46, enjoy a quiet life at the Los Angeles home, which they designed together.

“There was a time when I thought there was something romantic about picking up and trotting off somewhere different every three months. Now I’m becoming more particular about the projects I take,” Aniston told Architectural Digest. “I look around at my husband and my dogs and our home, and there’s nowhere else I want to be.”