Jessica Simspon Takes Husband Eric Johnson's Last Name

Jessica Simpson shared this Instagram photo captioned "Jessica Johnson" from her Mexican honeymoon

A new husband. A new life of wedded bliss. And now, a new last name!

Jessica Simpson has taken husband Eric Johnson's last name, posting an Instagram snapshot proudly proclaiming the moniker "Jessica Johnson" in its caption.

And what a snapshot it is: The star basks in the sun - and, no doubt, the glow of being a newlywed - as she lounges on a pool chair while wearing a festive one-piece swimsuit.

In hand? A refreshing drink to match the sunny vibe.

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Simpson, 34, didn't let slip any other details about the pic, although it's not a stretch to wager that the star and her hubby, also 34, are on a rollicking honeymoon following their lavish wedding blowout.

The duo tied the knot on July 5 at San Ysidro Ranch in Montecito, California, in front of 275 guests. The bride wore a stunning Carolina Herrera gown as she beamed alongside her husband, but it was the couple's two children - 2-year-old flower girl Maxwell and 1-year-old ring bearer Ace - who stole the show, drawing a standing ovation from fawning guests.

"Before I walked out, I kept hearing all the applause, so my kids got standing ovations!" the star gushed to WHO, as she soaked up all the joys of her big day.

"It's so surreal," she said of exchanging "I do"s with Johnson. "This has been something we've wanted ever since we met."