She sparked rumours that she was pregnant with new fiance Ryan Sweeting's baby after recently announcing their sudden engagement.

But Kaley Cuoco adamantly denies that she's expecting her first child.

The Big Bang Theory star took to her Twitter account to address the recent claims.

'I would like to make something very clear to anyone who cares. IAM NOT EFFING PREGNANT,' she wrote. 'Do with that what you will.'
Kaley and Ryan got engaged after a whirlwind romance that saw the couple dating for a mere three months.

The actress's rep confirmed the engagement news to Us Weekly back in September after the star flashed a massive diamond sparkler while on the Los Angeles set of her film The Wedding Ringer.

'It's only been three months but she knows Ryan is the one,' a source told the magazine. 'When you know, you know.'

Ryan popped the question with a 2.5 carat sparkler from Red C Jewels, that reportedly cost $65,000, just three days after he stepped on the red carpet with his sweetie during the Emmy Awards in LA.

Kaley soon after tweeted: 'Flying high, I could literally touch the sky with you . . . '

'[She's] never felt this way. She knows this is it. And the ring is gorgeous!' a friend told Us Weekly at the time.

Kaley and her boyfriend have been inseparable since early August, and she helped him recover from recent back surgery.

'A million people, all I see is her,' Sweeting recently captioned a romantic Instagram snap of Kaley - whom he calls 'the most beautiful girl.'

Before Sweeting, the Toyota spokesperson dated Man of Steel's Henry Cavill for a whirlwind two weeks in July.

Kaley was briefly engaged to addiction specialist Josh Resnik and she secretly dated her co-star from the CBS show, Johnny Galecki, for two years.

She recently reprised her role as outgoing neighbor Penny in the seventh season of Big Bang Theory on CBS.