Jennifer Aniston turns 55! The Friends star says she is 'grateful'

Jennifer Aniston turned 55-years-old on Super Bowl Sunday.

And the Friends actress was quick to take to Instagram to wish herself a happy birthday.

In her post she said she was 'grateful' for her life as she shared dozens of flashback photos, even some from her teen years.

The star also quotes The Layers by Stanley Kunitz.

'I have walked through many lives, some of them my own, and I am not who I was, though some principle of being abides, from which I struggle not to stray.

'When I look behind, as I am compelled to look before I can gather strength to proceed on my journey, I see the milestones dwindling toward the horizon and the slow fires trailing from the abandoned camp-sites, over which scavenger  angels wheel on heavy wings.'

There was also a passage about 'living in the layers, not on the litter.'

Salma Hayek also shared a tribute as she posed with the Emmy winning star. 

Reese Witherspoon added, 'Happy Birthday to the greatest friend / partner / TV sister I could ever hope for! I love you @jenniferaniston.'

This comes after the star was seen in a Super Bowl ad with David Schwimmer.

The actress enjoyed a mini Friends reunion with her on-screen love-interest from the show Schwimmer, 57, in a new Uber Eats commercial for the Super Bowl.

The minute-long spot features several stars including David and Victoria Beckham in addition to country music sensation Jelly Roll but it was the former co-stars' interaction which was highlighted most of all.

The premise of the funny commercial actually begins with Jennifer who receives a bag of different goods including flowers and shampoo from Uber Eats which is handed by a production assistant.

As she hands the bag to the A-lister she tells the star that she didn't remember that you could get 'all this stuff on Uber Eats.'