Liam Hemsworth is said to be fed up with Miley Cyrus's childish attitude.

The Hunger Games actor has reportedly begged his popstar fiancee to stop venting her emotions on Twitter again after she publically declared her love for him following an argument today.

"Why do I torture myself and what ps I love you. ahhhhhh. I have got to pull it together," she wrote.

Liam is rumored to have already been frustrated with the 19-year-old "Can't be Tamed" singer - whom he got engaged to in June - after she took a public swipe at their relationship earlier this month. "Ever feel like you want just ... something more. Not sure what exactly ... passion perhaps?" she wrote on September 13. She later backtracked and wrote, "no there is not trouble in paradise ... just thoughts."

A source told Star magazine recently, "Miley's tweet was such a huge insult to Liam. She tried to pass it off like it had nothing to do with him, but it totally affected him, no matter what she tries to say. She was trying to get his attention, but she just ended up making him pull away from her more."

Miley is known for regularly making dramatic outbursts on the site and Liam - who is currently filming the second installment of The Hunger Games in North Carolina - has urged her delete her page as it has become a constant source of friction in their relationship. "He think she's acting like an immature schoolgirl, and he wants her to get off Twitter completely," the source said.

Miley previously admitted her actor beau was one of the reasons she quit the site in 2009. Shortly before terminating her account, she wrote, "FYI Liam doesn't have a Twitter and he wants ME to delete mine with good reason."

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