Witherspoon's friends and co-stars took to social media to celebrate Witherspoon's big birthday.
Awkwafina, Kristen Wiig and Renee Zellweger will also be presenting.
The pair acted out the famous 'Chaos Theory' scene from the original film.
'I really enjoy some J.Lo.'
Friends who social distance together, stay together!
Laura Dern, Viola Davis, Michelle Pfeiffer and more shared their 'I Voted' selfies.
ET takes you inside the biggest parties of the night!
ET spoke with Dern, her mom and her kids after winning Oscar gold at the Governor's Ball.
Laura Dern emotionally accepted the award for Best Supporting Actress at the 92nd annual Academy Awards
On Sunday, the awards season comes to an end with the Academy Awards honoring the best in film from 2019.
The 'Little Women' director was one of the many female director snubs this year.
Laura Dern was recognized for her performance as divorce lawyer Nora Fanshaw in 'Marriage Story.'
The two looked gorgeous in black-and-white outfits.
Mindy Kaling is playing matchmaker at the 2020 Academy Awards, which air Sunday on ABC.