All the details on Grace Gummer’s estimated $100K engagement ring

“Forever” has a nice ring to it.

Mark Ronson has confirmed his engagement, weeks after girlfriend Grace Gummer — the actress daughter of Meryl Streep — stepped out in London wearing a diamond ring that experts have ballparked in the $100,000 range.

“Grace’s diamond appears to be square-shaped, making it likely a princess cut, Asscher cut or cushion cut,” Mike Fried, the CEO of The Diamond Pro, told Page Six Style on Tuesday.

“Her diamond looks to be 3 to 5 carats and could have a value of $100,000 or more, depending on its quality.”

Fried also noted that Gummer’s “stunning” ring appears to feature a “solitaire or three-stone design.”

Apeksha Kothari, the COO of Rare Carat, also estimated the size of Gummer’s ring at around 4 carats, and told us it could easily have cost $125,000.

Ronson, 45, and Gummer, 35, have reportedly been dating since last year.

During a recent episode of his podcast, “The Fader Uncovered,” Ronson said that he “got engaged last week,” but did not name his fiancée. The music producer also spilled the details on his first kiss with his future Mrs.

“There’s a plaque for that somewhere. There’s a first kiss, very corny Hallmark first kiss plaque,” Ronson quipped, noting the couple smooched to “InnerSpeaker,” Tame Impala’s debut album.

Gummer, the third child of Streep and husband Don Gummer, filed for divorce from keyboardist Tay Strathairn in March 2020. They tied the knot in July 2019.

As for Ronson, the music producer wed French actress Joséphine de La Baume in 2011. Their divorce was finalized in 2018.