The two began dating in the summer of 2018

The couple, who began dating in the summer of 2018, tied the knot in Montecito, California, on Saturday in front of close family and friends. “The venue is beautiful. Lots of flowers and greenery everywhere. It’s a very romantic setting for a wedding,” a source tells PEOPLE.

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 Rob Lowe with his sons Johnny and Matthew.

Pratt was spotted with his wedding band on his left hand as he escorted his bride to the tented reception area.

Credit: Mega Agency
Chris Pratt and Katherine Schwarzenegger
Chris Pratt and Katherine Schwarzenegger
| Credit: BACKGRID

After the ceremony, guests enjoyed cocktails on the lawn while a live band played. As for the food served during the reception, the bride and groom had a selection from a “very vibrant menu,” an insider says.

“They are using only local food. It’s a lot of fresh vegetables. They didn’t want the menu to be too heavy, or rich. It’s more of a light summer menu,” the insider shares. “For dessert, there are lighter options as well like raspberries, blueberries and red currant.”

During the reception, Pratt made a speech and thanked their guests for joining him and his new bride on their special day. In addition, guests danced to Bruno Mars’ “24K Magic” and ”Uptown Funk” as well as Neil Diamond’s “Sweet Caroline,” Journey’s ”Don’t Stop Believin’” and Miley Cyrus’ ”Party in the U.S.A.”

Katherine Schwarzenegger
Katherine Schwarzenegger
| Credit: BACKGRID
Chris Pratt and Katherine Schwarzenegger

A day after their wedding, the newlyweds shared a photo from their ceremony along with a sweet message.

“Yesterday was the best day of our lives! We became husband and wife in front of God, our families and those we love. It was intimate, moving and emotional. We feel so blessed to begin this new chapter of our lives. We are so thankful to our families and our friends who stood with us,” Pratt and Schwarzenegger wrote in a joint statement.

“Grateful to Mr. Giorgio Armani, who created a once in a lifetime dress for me to wear,” the bride wrote, while the groom said: “And for me, the perfect suit.”

Pratt, 39, and Schwarzenegger, 29, made their red carpet debut as a couple in April at the premiere of Avengers: Endgame. He also attended Schwarzenegger’s bridal shower later that month where he gave a sweet toast to his bride-to-be.

“Katherine was glowing the whole afternoon and having the best time celebrating with her friends and family,” an insider told PEOPLE at the time.

Her mother, Maria, was in attendance and “definitely went all-out for the shower but it still felt very down-to-earth and intimate inside,” the source continued.

“Katherine lit up when Chris arrived,” the insider added. “He also gave a sweet toast. They were adorable together and he wanted her to have all the attention.”

The actor announced they were engaged on Instagram in January, captioning the post, “Sweet Katherine, so happy you said yes! I’m thrilled to be marrying you. Proud to live boldly in faith with you. Here we go! 💍🙏♥️.”

Chris Pratt and Katherine Schwarzenegger
Katherine Schwarzenegger and Chris Pratt
| Credit: VALERIE MACON/AFP/Getty Images

Pratt’s proposal comes almost two years after the actor announced that he and ex Anna Faris were separating in July 2017 after eight years of marriage. The former couple shares a 6-year-old son named Jack.

“Anna and I are sad to announce we are legally separating,” Pratt wrote in a joint statement shared on Facebook at the time. “We tried hard for a long time, and we’re really disappointed.” Pratt and Faris officially filed for divorce in December 2017.

In September 2018, a source told PEOPLE that the romance was heating up — and that the couple could get engaged quickly.

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“They’re such a great fit together,” the source said at the time. “It’s only been a few months but Chris and Katherine are both very serious about the relationship and their friends wouldn’t be surprised if they got engaged sooner rather than later. Katherine has spent time with Chris’ family and they all love her too. She fits in really well with them and vice versa.”

Schwarzenegger also bonded with Pratt’s son Jack, 6. The three were seen out on happy ice cream and lunch outings over the summer and were spotted trick-or-treating together on Halloween with Faris and her boyfriend, cinematographer Michael Barrett, 48.

“Along with Katherine and Michael, they all took Jack trick-or-treating in Pacific Palisades,” a source told PEOPLE at the time. “It seems they all get along really well. Everyone had a good time. They were making an effort to make sure Jack had a great Halloween.”