Best Dressed Celebrities at the 2015 Vanity Fair Oscars Party in Hollywood

Natalie Portman looked regal in her cream white Dior column gown. The long-sleeved look was paired with drop earrings, an elegant bun and a metallic clutch.

Rita Ora flashed ample skin in her custom made Donna Karan gown. The revealing sheer black showed off most off her body and was styled with bold red lips. Rita Ora wore a Marchesa gown at the 2015 Oscars.

Miranda Kerr flaunted cleavage in a custom made Emilio Pucci gown. The white dress featured sequinned gold straps and was styled with a Judith Leiber clutch and Jimmy Choo shoes.

After her dazzling Elie Saab gown at the 2015 Oscars, Jennifer Lopez attended the after party in another sheer creation. The star wore a Zuhair Murad Couture gown and styled it with Neil Lane jewellery and a fur wrap from Helen Yarmak.

Hailee Steinfeld attended the event in a whimsical printed gown. The sleeveless dress featured a fitted bodice and a full skirt and was styled with dark oxblood lips and a ponytail hairdo.

Jessica Chastain, who wore Givenchy Couture to the 2015 Oscars, attended the event in an H&M Conscious Collection dress. The curve hugging plunging gown with a pleated hem was styled with Jimmy Choo heels and Piaget jewels.

Behati Prinsloo opted for a slinky beige halter dress after her two piece red and black beaded Armani Prive gown. The dress featured delicate straps, and the model wore metallic sandals and carried a matching clutch.

Lady Gaga opted for another glamorous gown for the Oscars festivities, and wore a dramatic black gown with a long train for the party. Tear drop earrings and side-swept loose hair completed her style. She wore a custom Azzedaine Alaia white gown for the Oscars with red gloves.

Olivia Munn arrived in a pleated Zac Posen gown. The blue halter dress was styled with a Lee Savage clutch, Christian Louboutin heels and Norman Silverman jewels.

Isla Fisher decorated her baby bump glamorously in a white figure hugging gown with a dazzling blue floral detail. The stylish look was paired with side-swept wavy hair and a black clutch.

Amy Adams went for a sexy look consisting of an Atelier Versace dress. The strapless figure hugging dress was styled with Brain Atwood heels, Lorraine Schwartz jewels and a Judith Leiber clutch.

Sofia Vergara flashed her curves in a blue strapless gown. The slinky sequinned creation was floor grazing, and the actress styled it with sleek hair.

Margot Robbie flaunted another elegant look after her Saint Laurent gown with a $1.5 million necklace at the Oscars. The Australian wore a strapless monochrome midi frock and styled it with black accessories and red lips.