Jennifer Lopez hits the gym wearing her huge engagement ring

Jennifer Lopez and Alex Rodriguez are back from vacation — and back at the gym.

The singer, 49, headed to a workout with her fiancé in Miami, Florida, on Wednesday, giving fans a first close-up look at her $1.8 million engagement ring.

Rodriguez got down on one knee on March 9 while the two were on vacation in the Bahamas at an exclusive island. The beachside proposal was made even more magical by the 16-carat sparkler, which A. Rod spent months “painstakingly” searching for, a source told Page Six.

While Rodriguez wore his World Series ring during the couple’s special moment, J.Lo was caught by surprise, clad in a breezy skirt and top, pulled-back hair and a clean white manicure.

“There aren’t many words to share with you, only feelings. Gratitude. Excitement. And just… joy,” he wrote on Instagram after announcing the engagement.

“We know there is work to do to keep building a family and future we can be proud of, and we can’t do it without all of you. We are so thankful for all your messages of love and congratulations.”

They may be looking forward to married life — but for now, they’re sweating for the wedding.