Actor Robert Pattinson reportedly called singer Katy Perry "so hot" at the recent after-party for his new movie "The Rover" here.

The "Twilight" star was spotted flirting with Perry at the after-party before telling his friends that he has a crush on the singer, reports femalefirst.co.uk.

"They were heavily flirting. At one point, Robert sauntered to the bar with a pal and was heard saying, 'She's so hot,' nodding in Katy's direction," a source was quoted by the New York Post newspaper's Page Six column as saying.

The duo had also sparked romance rumours earlier in April when they spent time together at a music festival.