Kaley Cuoco blasts rumours she is pregnant.

The 'Big Bang Theory' actress has slammed speculation she is expecting fiance Ryan Sweeting's child, and took to Twitter to make herself clear.

She wrote: ''I would like to make something very clear to anyone who cares.

''IAM NOT EFFING PREGNANT. Do with that what you will. (sic)''

Although they may not have made plans to expand their family just yet, Kaley has recently revealed she is keen to marry the tennis player as soon as possible.

She said: ''We've been planning, so hopefully early next year.

''We don't have an exact date, but I want to marry him tomorrow so I want to go as fast as possible.''

However, the 27-year-old star has also admitted she almost didn't meet Ryan at all after she was hurt following the end of her relationship with Henry Cavill.

She previously explained: ''I was putting it off and really nervous about it and just not wanting to do this.

''And so [my friend] gave him my number and he texted me. He was like, 'I'm coming to LA.'

''I'm like, 'Oh my god, so now I have to see this guy? Do I have to hang out with him all weekend? Is he going to be here for, like, days?' ''