Jeff Vespa/Getty Images for The Weinstein CompanyIt's time to celebrate the Oscars!
The festivities were in full swing on Saturday evening in Tinseltown as this year's nominees and many A-listers gathered at some hot-spot celebrations around town.
Taylor Swift, clad in an Oscar De La Renta ivory Chantilly lace embroidered dress, posed with 18-time Oscar nominee Meryl Streep and Jaime King at the Weinstein Company Pre-Oscar Party hosted by DeLeon Tequila at the Montage Hotel in Beverly Hills.
The country superstar was spotted chatting with Harvey Weinstein, a source tells E! News. Weinstein also introduced Jason Alexander to the stage and he performed four songs from the musical Finding Neverland.
Other celebs in attendance included Kim Kardashian, Oprah Winfrey, Harry Styles, Bono, Chiwetel Ejiofor, Chris Evans, Jamie Foxx, Heidi Klum, Nicole Scherzinger and many more.
Blue Jasmine co-stars and Oscar nominees Cate Blanchett and Sally Hawkins walked the red carpet together at the Sony Pictures Classics Oscar Nominees Dinner 2014 at Supper Suite by STK presented by Moet & Chandon.
Blanchett wowed in a Stella McCartney one shoulder black jumper, while Hawkins looked chic in a grey Mulberry dress.
The Australian actress was heard joking with guests that she was going to wear Crocs on the Oscars red carpet.
Anne Hathaway, Rosie Huntington-Whiteley, Rachel Zoe and hubby Rodger Berman, Michael B. Jordan and Lily Collins attended the Chanel and Charles Finch Pre-Oscar Dinner.
The A-list crowd was greeted with a full mariachi band as they walked down the stairs into Madeo restaurant, a source tells E! News. Guests were treated to an array of delicious appetizers, including baby pizzas, olives, puff pastries with anchovies, a refreshing cucumber beverage and of course, champagne.
The Les Misérables winner looked chic in a Salvatore Ferragamo LBD and held hands with her hubby Adam Shulman as they navigated their way around the restaurant.
Guests wore lots of black in fur and leather variations and some wore touches of white, the source added. There were also many conversations about the rainy weather and how it is a "real bummer" the forecast isn't sunny for the big day.
Newly single John Mayer arrived solo at the Grey Goose pre-Oscar bash hosted by Michael Sugar, Warren Zavala, Mark Webb and Doug Wald.
"John stayed away from cameras, sort of moped around," a source tells E! News exclusively. The crooner was also spotted drinking a vodka tonic and hanging out with Anna Faris.
Zooey Deschanel drank red wine and danced around with friends, while Kellan Lutz was in "good spirits and surrounded by girls."
The star-studded crowd also included Benedict Cumberbatch, Chris Pratt, Samuel L. Jackson, Emmanuelle Chriqui and Adam Scott.
—Additional reporting by Sara Kitnick and Marc Malkin