Revealed: Reese Witherspoon's Engagement Ring Details!

We've got the scoop on the bride-to-be's new bling from fiancé Jim Toth

Reese Witherspoon's ice is hot.

We just got the 411 on her megablingy engagement ring…

The Oscar winner's talent agent beau, Jim Toth, popped the question with a 4-carat Ashoka diamond set on a pavé diamond and platinum band.

Toth worked closely with the William Goldberg Diamond Corporation to design the ring.

He is said to have been inspired by the story of the original Ashoka diamond owned by Ashoka the Great, India's emperor from 304 to 232 B.C. who is known for, among other things, his Buddhist faith and promotion of love and compassion.

Less than 10 percent of rough diamonds possess the potential to become an Ashoka-cut diamond with 62 displayed facets and rounded corners.

Sounds stunning!