Before they attended Jimmy Kimmel's wedding on July 13, Jennifer Aniston and Justin Theroux spent some time at the Hacienda Shop at Ojai Valley Inn & Spa.

Despite the breakup rumors, a source revealed how happy the two appeared to be.

"They were the nicest, sweetest people and were completely relaxed," a source reportedly told Us Weekly. "They're very relaxed together and spent a lot of time sunbathing at the spa with all the other huge celebs."

Following the spa, the couple attended Kimmel's ceremony.

"Jen and Justin seemed very happy and in love," the source said.

"She had her hand on Justin's knee for most of the ceremony and was intently listening. At one point, she put her arm around Justin's neck and then put on her reading glasses and glanced at the wedding program."

At the event, Aniston kept it simple by wearing a tight and short black dress, while her fiancé sported a a grey suit. The couple was spotted enjoying a cocktail together. They were also photographed riding in a golf cart along with other guests Ellen DeGeneres and her wife Portia de Rossi. See photos here.

The source also revealed to the magazine that Aniston "looked genuinely happy" for her good friend on his big day.

Kimmel married his longtime girlfriend Molly McNearney at the Ojai Valley Inn. in California. McNearney is the co-head writer of Jimmy Kimmel Live and the couple started dating back in 2009. They got engaged three years later in August 2012. This is Kimmel's second marriage. He and his first wife Gina divorced in 2002 after being married for 14 years. The former couple has two children together.

The ceremony held around 300 guests many of which were the couple's A-list celebrity friends. The famous list included actor Ben Affleck and his wife Jennifer Garner, Matt Damon and his spouse Luciana, Howard Stern, Emily Blunt, John Krasinski, and Dax Shephard with his fiancee Kristen Bell, according to USA Today.

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Jennifer Aniston, Justin Theroux