It's no secret that Marvel likes to keep a lot of secrets. The studio is well-known for taking extra measures to prevent any spoilers from leaking on the Internet.

However, this doesn't stop fans from begging the 'Captain America: Civil War' stars for rare set photos. Paul Bettany is one actor who has been hounded by his Twitter followers for pictures.

Bettany, who will reprise his role as Vision from 'Avengers: Age of Ultron,' decided to post a very exclusive photo on Twitter. The 'Wimbledon' actor added a caption for the 'Civil War' fans:

"For all those wanting exclusive onset pics from Captain America 3, here #Marvel#CaptainAmericaCivilWar
#i'dbefired"

Perhaps the only secrets that have been divulged are that Bettany likes to wear black socks and has a very clean trailer.

Contrary to Bettany's last hashtag, none of his costars have been fired for posting set photos on their Instagram or Twitter account. 'Agent Carter' star Hayley Atwell, who will also appear in the movie, has peppered her Twitter account with funny set photos.

Atwell posted a selfie with Chris Evans and a shot of Anthony Mackie relaxing under an umbrella. She recently tweeted, "Captain America has 'muscle milk' in his refrigerator. No joke." This was immediately followed by photographic evidence, with the caption, "Told you."

Bettany has appeared in several films like 'Gangster No. 1,' 'A Knight's Tale' and 'Master and Commander: The Far Side of the Universe.' He provided the voice of J.A.R.V.I.S in the Iron Man and Avengers movies before finally getting the role of the android The Vision.

Atwell started out in several theater productions before starring in the Woody Allen movie 'Cassandra's Dream.' She is best known for playing Peggy Carter in the Captain America movies and the TV series 'Agent Carter.'

'Captain America: Civil War' will be released on May 6, 2016.