Credit: Steve Granitz/WireImage

Drew Barrymore wants Will Kopelman to put a ring on it!

The actress -- who turns 37 in February -- "is yearning to get married and have kids," a source tells Us Weekly.

The insider says that Kopelman, 34, has been thinking about rings, and could pop the question "around the one-year mark of their dating" this winter.

"He's madly in love and knows she's The One, but he just needs a bit more time."

Still the art consultant understands he can't wait that long. Adds the source, "If this were some twentysomething woman, there would be no rush."

In fact, since Barrymore has babies on the brain, the insider adds, "I could see her getting pregnant before they get married!"