Chris MacMillan, the man behind the now iconic hairstyle The Rachel, shared the unusually candid snap of the former Friends actress, 44, and captioned it, "Best #friends #no makeup #girl-time".
The pair have been friends for twenty years. Despite Jennifer insisting that her and fiancé Justin Theroux haven't set a wedding date yet, she has confirmed that Chris will be in charge of her hair on the big day.
Jennifer has been busy promoting her new film We're The Millers. Attending the New York premiere on Thursday night, the actress showed off a curvier figure than usual in a form-fitting satin dress.
The plum-hued pencil dress flaunted her fabulously tone figure and a more rounded tummy than normal.
She teamed the Burberry creation with sky-high suede heels and one show stopping accessory – her dazzling emerald-cut diamond engagement ring, rumoured to be eight carats.
The former Friends actress showed off a healthy summer glow and beamed for photographers as she posed on the red carpet.
She was joined by her co-stars Emma Roberts, Jason Sudeikis and his fiancée Olivia Wilde among others.
Jen's fiancé Justin wasn't on the red carpet but joined her afterwards for the glittering afterparty.
The couple, who got engaged on Justin's birthday on 10 August 2012 after dating for more than a year, have not set a wedding date.
During the New York press conference for the comedy flick, the actress revealed that the couple are in no rush to walk down the aisle.
"We just want to do it when it's perfect, and we're not rushed, and no one is rushing from a job or rushing to a job," she explained.
"We have yet to set any date. There have been no cancelled weddings. There have been no postponed weddings. There have been no arguments about where to get married. Just clearing all that up."
It remains to be seen whether the pair will start a family but Jennifer has made it clear in the past that children are on the cards.
"I've said it so many times: I'm going to have children ," she told US Vogue in 2008. "I just know it."