Taylor Swift and Calvin Harris are rumored to be planning to move in together.

Just a five months after they publicly started dating, OK magazine reports things are quickly heating up between the new power couple and they appear in the process of taking things to the next level.

"Taylor trusts Calvin more than anyone she's ever met, and she's ready to take the next step," said a source. "Both of them have to travel all over for gigs, but they hate being apart. They practically live at other's places whenever they have some downtime."

Thirty-one-year-old Harris has often been spotted leaving Swift's home after sleepovers on several occasions over the last several weeks. Over the recent July 4 holiday, the pair spent the weekend at Swift's Rhode Island mansion.

"She's never let a guy stay with her for any length of time," a source close to 25-year-old Swift recently claimed. "For this to happen so quickly says a lot.

Before taking up with Harris, Swift basically swore off dating following a string of high-profile breakups, including one with singer John Mayer. In the case of Harris, HollywoodLife reports the two are already declaring their love for one another.

"They both are very into each other and are in love, and say it to each other quite often," the source said of the new couple who recently spent time in Europe together while Swift was touring there.

On the surface, much of Swift's good fortune seems well deserved. The "Shake It Off" singer recently donated $50,000 to help a young fan battling leukemia.

Just 11-yeard-old, Naomi Oakes is a dedicated Swiftie who was recently forced to miss her Phoenix concert because she was hospitalized. Swift made the donation to her GoFund account to help defray medical costs.