The pair became engaged in January after seven months of dating

Chris Pratt and Katherine Schwarzenegger are married!

The couple, who were first spotted together in June 2018, tied the knot on Saturday during an intimate ceremony in Montecito, California, sources tell PEOPLE.

Get push notifications with news, features and more.

“You can tell today is the happiest day for Katherine. She hasn’t stopped smiling. And Chris seems giddy with excitement,” a source says. “The venue is beautiful. Lots of flowers and greenery everywhere. It’s a very romantic setting for a wedding.”

The source adds, “The whole family took wedding photos, including her parents Maria [Shriver] and Arnold [Schwarzenegger]. Everyone just looked so happy.”

Guests in attendance included his 6-year-old son Jack, her siblings — brothers Patrick and Christopher as well as sister Christina — and close friend Rob Lowe and his sons Johnny and Matthew.

Image zoom BACKGRID

Image zoom BACKGRID

Pratt, 39, and Schwarzenegger, 29, announced their engagement on social media back in January after seven months of dating.

It marks her first marriage and his second. The actor was previously married to Anna Faris; their nine-year marriage came to an end in 2017 (the two share son, Jack).

Image zoom RoundPondEstate/Instagram

In April, the pair celebrated their wedding at an intimate bridal shower.

“Katherine was glowing the whole afternoon and having the best time celebrating with her friends and family,” a source told PEOPLE about the party held at her mother Maria Shriver’s home.

Though many people made speeches about Schwarzenegger, one tribute was especially heartfelt.

“Katherine lit up when Chris arrived,” the source said of Pratt, who made an appearance later in the shower. “He also gave a sweet toast. They were adorable together and he wanted her to have all the attention.”

Image zoom Chris Pratt and Katherine Schwarzenegger VALERIE MACON/AFP/Getty Images

Before the wedding, a source told PEOPLE that the couple was on the same page about keeping their nuptials small.

“Chris and Katherine’s wedding will be a very intimate affair with just their closest loved ones,” the source said. “They don’t want it to be a circus. The focus will be their commitment to each other, and God will play a very large role on their big day. It’s been such a special time not just for them, but also for their families. Everyone is so excited.”

From the start, faith has played a large part in their relationship.

A source previously told PEOPLE that Pratt was initially attracted to Schwarzenegger’s strong spirituality.