Looking laid-back and relaxed, Jennifer Aniston made her way to a friend’s house to join in the celebration of their son’s first birthday. Keeping it simple and casual, the newly single actress donned a tank top, jeans, and slides for Jimmy Kimmel’s bash for his son Billy. The 49-year-old was spotted arriving at the comedian’s residence, with insiders revealing that she was seen shortly after her split from Justin Theroux, who had already left.

In a laid-back manner: Jennifer Aniston looked cheerful as she made her way to Jimmy Kimmel’s place for his son’s first birthday bash. The two are close pals of the funny late-night host Kimmel and his wife Molly McNearney. Little Billy’s birthday celebration was a significant moment for the family, considering the health battles he has faced since he was young. The little one had a major heart surgery just days after his birth last May, and Jimmy shared on Twitter how resilient his son has been.

Transitioning: The 49-year-old was captured on camera arriving at the comedian’s residence, with insiders revealing to DailyMail.com that the sighting occurred shortly after her ex-husband Justin Theroux returned home. The 50-year-old also encouraged his 11.5 million social media followers to get registered to vote as a special present for Billy, in hopes of enhancing the healthcare system in the United States. Posting a photo of his son seated in his highchair sporting a party hat, surrounded by balloons, Jimmy expressed gratitude for the nurses and doctors at @CedarsSinai & @ChildrensLA who played a role in saving his child’s life a year ago. He also urged everyone not to remain silent and to join in celebrating Billy’s birthday by taking action and registering to vote at https://vote.gov.