Oscars 2015
Jennifer Lopez wore a shimmering white gown for the Weinstein Company's pre-Oscar bash.AFP / Getty Images

The stars have been getting red carpet ready in anticipation of the biggest night of the year in the movie calendar, the 87th Academy awards.

A flurry of A list stars attended the high profile pre-Oscars parties hosted by the Weinstein Company and Chanel.

Oscars 2015
Voice judge Rita Ora performend at the Weinstein party.AFP / Getty Images

White was the order of the evening with Jennifer Lopez looking regal in a shimmering white gown and E! host Guiliana Rancic and British pop star Rita Ora followed suit.

There was a strong British presence at the event hosted by Hollywood movie mogul Harvey Weinstein with Gary Barlow and Ora performing along with Nicole Scherzinger while James Cordon attended with his wife.

Nominated for her performance in The Imitatiion Games, a pregnant Keira Knightley hid her baby bump in a white tiered skirt.

The stars turned to Twitter to give fans a glimpse of the preparations for the big night which is taking place at the Dolby Theater in Hollywood.

Khloe Kardashian is on duty for E! following her successful stint as a presenter at the Grammy's.

She posted a photo of her look for the night and her personal E! microphone.

E! veteran Giuliana Rancic shared pictures of herself in her gown ahead of the event revealing a bold red carpet look. One of the first to arrive on the red carpet she wore a lace embellished red gown with flattering sheer panels.

Reese Witherspoon who is nominated for Best Actress for her performance in Wild posted an image of a bouquet of white roses and a photo of herself with husband Jim Toth.

She wrote: "The best thing to have on the red carpet is someone who loves you and supports you....(and buys you flowers.)"