Hollywood knows how to party, and Oscars weekend is no exception! As anticipation mounts for the big show on Sunday, the stars have been warming up for the red carpet all week at celebrations across LA. On Saturday, Brad Pitt  and Angelina Jolie  buddied up with Lupita Nyong'o during a dinner for 12 Years a Slave at the famed Sunset Tower. Just the day before, Jared Leto  was the center of attention during Los Angeles Confidential magazine's bash at the SLS Hotel, and Cate Blanchett  joined Anna Kendrick  and Joshua Jackson  for a swanky soiree at Giorgio Armani's Beverly Hills boutique. Meanwhile, Diane Kruger  and Rosario Dawson  stunned at the National Hispanic Media Coalition Impact Awards Gala. Earlier in the week, Amy Adams  stayed close to fiancé Darren Le Gallo at a party celebrating American Hustle, and Naomi Watts  hosted a glamorous Bulgari bash  with an appearance from Kate Hudson . Keep scrolling for the best Oscars parties so far, and make sure to fill out our Oscars ballot  for a chance to win $1,000!
Brad, Lupita, and Chiwetel Ejiofor gathered at the 12 Years a Slave dinner on Saturday.
Jared Leto  kicked off his Los Angeles Confidential party with an animated party face.
Cate Blanchett  was all smiles with husband Andrew Upton at Giorgio Armani's party on Friday.
Diane Kruger  went with a classic look at the NHMC Impact Awards on Friday.
Anna Kendrick , Miles Teller, and Aubrey Plaza were dressed to the nines for the Giorgio Armani party on Friday.
Dianna Agron , Olivia Munn, Roberta Armani, and Emmy Rossum brought a high dose of girl power to the Giorgio Armani event on Friday.
Lupita Nyong'o and Helen Mirren  shared a sweet moment at the Women in Film pre-Oscar cocktail party on Friday.
Diego Luna and Rosario Dawson  posed for a snap at the NHMC Impact Awards Gala.
Joshua Jackson  sported scruff at the Giorgio Armani party on Friday.
Miles Teller buddied up with Martin Scorsese  at Giorgio Armani's bash on Friday.
Rachel Zoe  hung out with Roberta Armani and husband Rodger Berman at the Giorgio Armani event on Friday.
Dianna Agron  said something to make Emmy Rossum laugh at the Giorgio Armani event on Friday.
Jeremy Piven  stepped out in a cap for Los Angeles Confidential magazine's party for Jared Leto  on Friday.
Robert De Niro  had an amusing conversation with film producer Mike Medavoy.
Jared Leto  gave his party with Los Angeles Confidential a thumbs-up on Friday.
Jamie Foxx  and Samuel L. Jackson flashed their pearly whites at the Armani bash on Friday.
Cate Blanchett  wore her hair up for the Giorgio Armani's soiree on Friday.
Naomi Watts  hosted Bulgari's party on Tuesday, which brought out her pal Kate Hudson .
Kerry Washington showed off her growing baby bump at the Essence Black Women in Hollywood Luncheon in LA on Thursday.
Jeremy Renner posed alongside Annabelle Wallis at Bulgari's party on Tuesday night.
Charlize Theron  cuddled up to Sean Penn  at Pharrell Williams's pre-Oscars bash on Thursday.
Kate Mara and Jenna Dewan got together for The Daily Front Row Fashion and Hollywood luncheon on Tuesday.
Pharrell met up with Jamie Foxx  at the party celebrating his Oscar-nominated single, "Happy," in LA on Thursday.
Jared Leto 's Los Angeles Confidential cover was on display at the magazine's party on Friday.
Emmy Rossum and Olivia Munn cracked up on Tuesday at a Bulgari event.
Maggie Grace met up with Kellan Lutz  inside the Vanity Fair Young Hollywood party back on Tuesday night.
Lupita Nyong'o was the woman of honor at Essence's Black Women in Hollywood Luncheon in LA on Thursday.
Amy Adams  stayed close to her fiancé, Darren Le Gallo, at a Vanity Fair party celebrating American Hustle on Thursday night.
Cate Blanchett  made a stunning arrival at an event on Rodeo Drive in Beverly Hills on Friday.
Ashley Greene  popped up at Global Green USA's pre-Oscars party on Wednesday night.
Chris Evans made Cobie Smulders laugh inside Vanity Fair's pre-Oscars party on Tuesday.
Odette Annable and Stacy Keibler posed for cameras inside Vanity Fair's soiree on Tuesday.
Emmy Rossum and Ashley Greene  palled around inside Bulgari's bash on Tuesday.
Malin Akerman wowed in a pale yellow dress at the Global Green event on Wednesday.
Angelina and Brad spent quality time with Lupita at the 12 Years a Slave dinner on Saturday.