Now that they reportedly wear promise rings, Robert Pattinson and girlfriend FKA twigs are supposedly discussing having kids together.

"Rob and Tahliah talk about kids all the time," an insider revealed to HollywoodLife.com. "They both agree that they want lots of kids and they want to travel extensively with them to teach them about the world and other cultures."

Also, the British couple is supposedly coming up with unique baby names already.

"They like to play name games, like what's the most interesting and meaningful name they can come up with for their future kids," the insider continued.

However, parenthood is certainly not an immediate thing for the two.

"They're not in a rush," the insider added. "They are still young and really into their careers, but love talking about the big family they will one day create together."

Last week, People reported that the Pattinson and FKA have been rocking their pre-engagement bands for a while.

"He wants to marry her," a mutual friend revealed, describing Pattinson as "much more calm and happy than before."

"They are inseparable when they are together. They live at his house," the source added.

According to E! Online, "Twilight" star actually gave the bling to the "Pendulum" singer back in December, sharing the "happy development in his relationship status with a few select friends around that same time at an I-want-to-marry-you dinner."

The publication added that while Pattinson has not shared a timetable with his pals, his proposal could happen as soon as this summer -- after FKA wraps up her ongoing tour and the "Maps to the Stars" actor finishes up with a couple of projects that he has been working on.

Moreover, Robert Pattinson was apparently the one who came up with the whole promise ring idea.

"It was Rob's idea to get the rings," a source told Us Weekly. "They're 'we're-in-a-committed-relationship' rings."

"He says this is the best relationship he has ever been in and he can see it being for life. He admires and respects her," another source claimed.