Jake Owen is engaged.

Jake Owen, Erica Hartlein and Paris Hartley [Instagram]

Jake Owen, Erica Hartlein and Paris Hartley [Instagram]

The 39-year-old country singer popped the question to Erica Hartlein - the mother of his 20-month-old daughter Paris Hartley - when they went to pick out a Christmas tree together and the proposal caught her by surprise.

He wrote on Instagram: "5 years ago we went and got our first Christmas Tree together....at this same spot. This year, I asked her if she'd like to get Christmas Trees every year for the rest of our lives.

"Our little Paris was there to witness the complete surprise. So much of a surprise, Erica didn't have her nails done..(yes, I now know that's big deal I guess).

"She said yes in the sprinkle of a Nashville snow. Life is good. I love you @ericahartlein."

Jake revealed that they celebrated by going to fast food restaurant Chick-fil-A and added: "we celebrated by going to her favorite restaurant. She was successful not getting Polynesian Sauce on that bling (sic)."

Meanwhile, Jake - who also has seven-year-old daughter Olive Pearl from a previous marriage - has revealed he is the happiest he's been in "15 years" after getting to spend more time at home during the coronavirus lockdown.

The star has been able to spend quality time with his family since the US went into lockdown amid the global pandemic.

He previously said: "I don't feel like a caged animal. I almost feel sometimes on the road like I'm a circus animal that's in a cage that, come showtime, they open up the cage, and you go out into the arena and you go do your little thing and then all of a sudden they're like 'Okay!' ... and the tour manager walks his animal back to the cage and they shut the door and then they roll you to the next city and you get out and do it again.

"I haven't been this happy in 15 years, which is weird to say in a time like now, but ... I'm hoping with this virus and everything that's happening is that it breeds that same love and energy into people of understanding that life is fragile and ... let's start taking care of everyone around us more."