Karen Gillan says shaving her head for 'Guardians of the Galaxy' was a "fun social experiment".
The former 'Doctor Who' actress stars as Nebula - a blue-skinned deadly assassin - in the sci-fi adventure film and she's confessed that although she had to shave her head for the role, she's glad she did because she found the experience "liberating".
Quizzed on how she'd found having a bald head, she told British TV's 'Lorraine': "That was a really weird experience, but also it was weirdly liberating and fun and interesting as a social experiment, just to see how differently people would treat me.
"I think people were pretty intimidated by me. I really ... I kind of liked it while I was playing the role."
The 26-year-old star - who appears alongside Chris Pratt, Zoe Saldana and Dave Bautista in the Marvel Comics film directed by James Gunn - also admitted that she enjoyed playing the enemy for the first time.
She explained: "It was really fun. I've never played a sort of bad character who's gone to the dark side so that was really fun to be able to explore."
Karen also revealed that although she enjoyed the experience of shaving off all her hair, she found herself missing having something to hide behind.
She added: "I realised that I did that [used it as a shield] after it was gone and I was like, 'Ahh there's no hiding curtains'."

Kelsey Grammer has become a father again.
The 'Frasier' actor's wife Kayte gave birth to their second child, a son, on Tuesday (22.07.14) and the little boy will be known as Gabriel, though it seems that is actually his middle name.
Kelsey - whose full name is Allen Kelsey Grammer - told 'Entertainment Tonight': "Our son will be called Gabriel as there is a tradition in our family of going by our middle names.
"We are blessed and excited to have this lovely young man join our family -- he is magnificent!"
The little boy was born at 8.28am in Los Angeles and weighed in at a healthy 8lbs 2oz.
Kelsey and Kayte are already parents to two-year-old Faith, while the 59-year-old actor has four other children from previous relationships.
The couple were left devastated when Kayte was carrying Faith as they were initially expecting twins, but sadly lost their baby boy.
However, Kelsey - who has been married four times - revealed last year he was keen to have more children with Kayte.
He said previously: "I think we'll have at least two more, if not three or four. I think it's a great way to live a life."

Robin Thicke is "done begging" Paula Patton to take him back and is finally "moving on".
The 37-year-old singer - who split from the actress earlier this year - has decided to accept his marriage of eight years is over and is now looking to the future, TMZ reports.
However, while a lawyer is working on separating their financial and physical assets, Robin in not yet ready to file for divorce.
The first sign Robin was ready to move on came with the news that they have decided to put their marital home up for sale.
The 'Blurred Lines' singer and the 'Baggage Claim' actress - who have been together for almost 20 years have a four-year-old son, Julian, together - split in February amid reports he had cheated on her.
And now they have put their exclusive Bird Street three bedroom, three-and-a-half bathroom home, which was first bought by Robin's father Alan Thicke in the 1990s and gifted to the couple in 2005 after their wedding, up for sale for almost three million dollars.
A pool, spa and courtyard are included with the property, which has impressive views of Downtown LA and celebrities who own homes in the area include Jennifer Aniston and Michael Buble.
The decision to put the house on the market comes after many embarrassing attempts by Robin, 37, to win back his spouse, including naming his latest album 'Paula' and making many public pleas for a reconciliation.

Conan O'Brien thinks talk show hosts are treated like "gods" in the US.
The 51-year-old presenter thinks it is fascinating he and his peers attract so much attention Stateside but can go virtually anywhere else unrecognised, likening their situation to the lesser-known alter egos of superheroes.
Speaking to Shortlist magazine, he said: "There's a long tradition of people who are gods in the States, but unknown anywhere else.
"[US tall show host] Johnny Carson used to go to Wimbledon every summer, and he'd talk about how odd it was to walk around without being recognised. He was like Superman without his cape."
While Conan - who began his career writing on 'Saturday Night Live' - is a household name in the US, he admits the changes in technology means he is no longer sure his audience actually tunes in to watch his show.
He said: "When fans tell me they liked something on the show, I never assume they saw it live any more. It's always through YouTube."
'Conan' is to be broadcast on TruTV in the UK at 11pm from August 4.

Jessica Biel will guest-star on the new season of 'New Girl'.
The 32-year-old actress - who shot to fame on TV's 'Seventh Heaven' before going on to launch a movie career - will make a return to the small screen to play "Kat, the hottest scientist in the world" in the Fox sitcom.
According to TV Line, Jessica's character will compete with Zooey Deschanel's Jess Day over a guy in the season four premiere.
Both try to hit on the same man at a wedding and hilarity ensues.
Meanwhile, creator Liz Meriweather recently insisted she has no plans for Zooey's character Jess to reconcile with ex-boyfriend Nick Miller any time soon even though fans are heavily invested in their relationship.
She said: "I love them together and I don't think it's it for them at all. I've never been in a good relationship ... I just found that it's been easier for me to write them as single idiots out in the world trying to get laid and looking for love.
"I had trouble figuring out where the conflict and comedy was coming from with them last season. Admittedly, it's definitely fun to keep them apart for more."

Justin Timberlake enjoyed an NSync reunion last week.
The 'Mirrors' hitmaker and former bandmate Chris Kirkpatrick visited bowling lounge Kings in Boston's Back Bay on Thursday (17.07.14) where they bowled a few rounds before enjoying some food.
A source told PEOPLE: "Justin bowled a 173, 142, 94 and 14. He ate a blackened chicken sandwich, buffalo wontons and drank a Stella Artois beer [before tucking into a] peanut butter sundae for dessert."
The duo were joined by Chris' wife Karly Skadany, some friends and two bodyguards but Justin's wife Jessica Biel is not believed to have been there.
Jovial Justin even signed a bowling pin before he left.
The 33-year-old singer was in town for his show at Boston's TD Garden and a few nights later enjoyed a slap-up meal at Strega Waterfront Italian restaurant.
He feasted on a number of items including homemade meatballs, scallops al Grand Marnier, lamb chops and homemade cannoli.
His waiter told PEOPLE: "Justin was easy going and super friendly. A regular guy who likes to have dinner with his friends."
NSync went on hiatus in 2002 and reunited briefly last year to perform with Justin at the MTV Video Music Awards (VMAs).

Lea Michele looked cool and casual in a black t-shirt and white shorts as she grabbed a cab in New York City with her new boyfriend, Matthew Paetz.

Jessie J tucked her hair behind her ears to reveal the huge pair of gold hoop earrings she was wearing as she left the BBC Radio 1 studios in London.

Selena Gomez appeared to have enjoyed her day in the St. Tropez sun as she arrived back from a boat trip showing off her golden tan in a black lace halter-neck top.

Cheryl Cole looked stunning in a floor-length dress as she left the launch event for her new perfume at the Avenue restaurant in London.

Jourdan Dunn showed off her figure at the launch of French Connection's #NeverMissATrick AW14 collection in London's West End, where she wore a white crop top and navy and white striped skirt.

Nicola Roberts posed in a Nando's air hostess outfit to celebrate the first airport opening of the PERi-PERi restaurant. Travellers passing through Gatwick Airport in London will get to exclusively try the new breakfast Chicken Roll.