Jennifer Aniston photobombed J.Lo, John Travolta kissed (a slightly reluctant) Scarlett Johansson and Lady Gaga hit the tiles - literally.

All the behind-the-scenes photos from the 2015 Oscars ceremony and afterparties

Pre-Oscars fritatta with Naomi Watts

Reese Witherspoon gets a good luck note from her mum

... and her husband

... And from Sofia Vergara

Naomi Watts gets her make-up done

Jennifer Lopez gets her hair done

Rita Ora gets the finishing touches done

Oprah gets a little prep in

Alessandra Ambrosio's yoga prep

Lupita Nyong'o looks to Prince for inspiration

Lena Dunham gets her glam on

Alessandra Ambrosio gets roller happy

Margot Robbie is red carpet-ready

Gwyneth Paltrow spreads the love

Reese Witherspoon is ready to roll

... and a back view

Naomi Watts practises her red carpet poise

Aaron Paul plays it casual

Jared Leto is excited

Emma Stone is raring to go

Lady Gaga and Keira Knightley say hi

Jennifer Aniston's game for a laugh

Emma Stone and Mark Ruffalo's red carpet snuggle

Rita Ora and Kerry Washington on the red carpet

A back view of Jennifer Lopez's incredible dress

Oscars presenters get set

Chrissy Teigen and John Legend fool around at the security gates

An army of Oscars wait to be collected

Scarlett Johansson gets a kiss from John Travolta

Jennifer Aniston watches the show backstage

Jennifer Aniston photobombs Jennifer Lopez

Jennifer Lopez and Meryl Streep take a selfie

Jennifer Hudson clicks heels with Meryl Streep

Scarlett Johansson is a Gaga fan

Lady Gaga and Julie Andrews embrace

Idris Elba and Jessica Chastain hang out

Ben Affleck takes a moment

Jennifer Hudson backstage

Anna Kendrick after presenting with Jack Black

Lupita Nyong'o with her brother Peter

Dakota Johnson and Liam Neeson hang out backstage

Patricia Arquette is the picture of calm after her win

Best actress winner Julianne Moore is very happy

Jennifer Hudson helps celebrates Common and John Legend's Oscar win

... and so does Oprah Winfrey

A little look at the Oscars food

... and the desserts

The after-parties fun begins

Solange Knowles takes to the decks

Diane Kruger and Joshua Jackson strike a pose

Sacha Baron Cohen and Isla Fisher get camera-ready

It's sultry Sofia Vergara

Kate Upton photobombs Judd Apatow and Leslie Mann

Mindy Kaling gets her smoulder on

Natalie Portman and Rashida Jones are all smiles

Monica Lewinsky joins the party

Elton John and family enjoy the show

Elton John and Kylie Minogue

Elton John cosies up with Jared Leto

Gaga ends the night in style

End of the night for Chrissy Teigen

Stars share candid inside snaps on Instagram

Behind-the-scenes photos from the 2015 Oscars show and afterparties