Secret Sleepovers! Katy Perry And Orlando Bloom Start Spending Nights Together

Katy Perry and Orlando Bloom just took their relationship to the new level.

The stars are now sharing secret sleepovers, RadarOnline.com can exclusively reveal.

A source close to the pair said that Bloom, 39, has invited the stunning singer, 31, to spend the night when he has custody of his Flynn, his 5-year-old son with ex-wife Miranda Kerr.

"Katy has been bonding with Flynn, and even staying over at Orlando's house when he has Flynn," an insider told RadarOnline.com. "He stays at her house when he doesn't have Flynn."

Bloom has been acting affectionate outside of the home, too. When he and Perry took Flynn to Robert Downey, Jr.'s Malibu home over the weekend, he introduced her to pals.

"He was introducing her as 'my Katy'", the source revealed.

As RadarOnline.com previously reported, Bloom and Perry were recently spotted driving around Los Angeles. The "Firework" singer was sitting in the back playing nanny to Flynn.

And earlier this month, they attended a producer's Hollywood dinner together.

"They were cuddling and flirting with each other all night," a source told Page Six.