Back to her old self: Emma Roberts covers up in a cosy rosy jumper after racy Pretty Woman Halloween costume

PUBLISHED: 21:26 EST, 30 October 2012 | UPDATED: 02:37 EST, 31 October 2012

She donned her aunt Julia Roberts's sexy Pretty Woman costume for a Halloween party last weekend.

But Emma Roberts was back to her old, more modestly-dressed self by Tuesday where the 21-year-old starlet was seen wearing a cosy rosy jumper while shopping at Rag & Bone in West Hollywood.

Covered up: Emma Roberts was back to her old, more modestly-dressed self while shopping in West Hollywood after donning her aunt Julia Roberts' sexy Pretty Woman costume for a Halloween party

The pretty ingenue kept her pale complexion shaded with a large black fedora, which matched her ripped-up skinny jeans and sensible flats.

Her conservative ensemble was a far cry from the blue-and-white mini-dress and thigh-high patent boots Emma slipped into for a Beverly Hills house party last Saturday.

Emma even wore a blonde bob wig to better evoke lovable hooker Vivian Ward in the 1990 romantic comedy, which launched her famous aunt's career.

Modest: The pretty ingenue kept her pale complexion shaded with a large black fedora, which matched her ripped-up skinny jeans and sensible flats

Fashionista: Emma, who was just named fashion advisor for the social shopping app Snapette, was seen shopping at Rag & Bone

The Nancy Drew star was accompanied by her boyfriend Evan Peters - dressed as a farmer - who stars in American Horror Story.

The young fashionista was recently inspired a pair of Nanette Lepore sunglasses and was named fashion advisor for the social shopping app Snapette.

There are only two types of clothing Emma will never be caught wearing in public - sweatpants and pajamas.

Shopaholic? Emma later removed her hat to shop at Barneys New York in Beverly Hills

She told Nylon Magazine: 'I know I'll regret it if someone takes a picture of me. I'll be like, "Ugh. I'm that girl that was wearing sweatpants and flip-flops out and about all day," and I don't want to be that person.'

Emma continued, 'No pajamas outside (laughs). By the way, I want to wear sweatpants on an airplane every day of my life but I'm like, "I don't want a picture of me."'

The Scream 4 starlet just wrapped her role in The Millers last week alongside Jennifer Aniston, Jason Sudeikis, and Ed Helms.

Work it, own it: Her conservative ensemble was a far cry from the blue-and-white mini-dress and thigh-high patent boots Emma slipped into for a Beverly Hills house party last Saturday

'I got to work with Jennifer Aniston [on We're The Millers], who's one of my career and fashion icons, so for me it was like a dream job,' she gushed to Nylon.

In the dark comedy Emma plays Julia, a 'disturbed 20-year-old runaway' who poses as Sudeikis and Aniston's daughter amidst their plan to ferry 1,400 pounds of marijuana from Mexico to the US.

She'll also appear in next year's Empire State, which stars Dwayne Johnson, Liam Hemsworth, and Nikki Reed.

Halloween: Emma, accompanied by her boyfriend Evan Peters, even wore a blonde bob wig to better evoke lovable hooker Vivian Ward in the 1990 romantic comedy, which launched her famous aunt's career