The 'Who You Love' hitmakers, who have been dating around 18 months, sparked speculation they were engaged when 'Prism' singer stepped out on Valentine's Day wearing a ring on her engagement finger, reported Daily Mirror.
"They'd love a June wedding. They want to get married at the San Ysidro Ranch in Katy's home town of Santa Barbara," a source said.
Perry, 29, was previously married to comedian Russell Brand.