At 26 years old, Mary-Kate Olsen isn't ready for marriage -- even though her 43-year-old beau Olivier Sarkozy is dying to put a ring out, sources reveal in the April 8 issue of Us Weekly.
PHOTOS: Which Olsen twin has better red carpet style?
The once-wed multimillionaire "wants to lock her down for life," an insider says of Sarkozy. "He calls her 'smart as a whip' and says she's mature for her age."
PHOTOS: Infamous May-December romances
The actress-turned-designer began dating the French banker 10 months ago, and "she's making him wait," a source tells Us. Adds another, "Mary-Kate wants to give it more time. She's not in any rush."
For more on the couple's blossoming romance, watch this week's Hot Stuff video, as explained by Us Weekly entertainment director Ian Drew and special guest, Florida Georgia Line!
PHOTOS: Mary-Kate and Ashley Olsen through the years
Also in the roundup: Sofia Vergara will use a gestational surrogate to have a baby with fiance Nick Loeb; why Hayden Panettiere is keeping her engagement to Wladimir Klitschko under wraps; and much more!
This article originally appeared on Usmagazine.com: Mary-Kate Olsen Is Making Olivier Sarkozy "Wait" to Propose
Get the scoop on the RHONJ stars' recent whereabouts on Replay.
From Carrie Underwood to Duchess Kate; get the pregnancy scoop on Replay hosted by Wonderwall's Kirby Kristen.
Julianne Hough, Victoria Beckham, and Nicole Scherzinger all get an F on this week's Fashion Offenders.
Take a look back at Prince William and Duchess Kate's cutest couple moments.
Get the scoop on Britney's new bachelorette status on Replay hosted by Wonderwall's Kirby Kristen.
See how Kate Hudson embraces Instagram on Celebs Gone Social
From Sofia Vergara to Justin Theroux, check out the rest of TV's hottest stars.
© 2014 Microsoft