Some high-profile celebrities are venturing into 2015 with significant changes in their lives. For one, Joseph Gordon-Levitt is no longer a bachelor as he and his girlfriend Tasha McCauley tied the knot in a quiet ceremony in their home on Dec. 20.

McCauley, the CEO and co-founder of robotics company Fellow Robots based at the NASA Research Park in Silicon Valley, is not one to grab the limelight, which is perhaps the reason for the low-profile nuptials.

In a 2013 interview, as quoted by People, Gordon-Levitt said, "I have a girlfriend but I tend not to really like to talk about it in public. The girl that I'm with, she really doesn't want to be a part of that."

On the same note, Ashton Kutcher and Mila Kunis are speculated to also have exchanged "I do's" over the holidays. The new dad to daughter Wyatt posted a photo on Facebook showing a message written on sand.

The message reads, "Happy New Year

The greeting is rather simple and innocent looking, but fans are quick to jump at the idea that the couple might have already said their vows, and that Kunis now bears the last name Kutcher. To further fan the flame, the actor posted another photo titled "The Most Awkward Wedding Kisses Ever."

2014 also formally brought other famous couples together. One of the most highly-publicized was "ER" star George Clooney's wedding to lawyer Amal Alamuddin on Sept. 27 in Italy. Brad Pitt and Angelina Jolie's wedding ceremony was privately held on Aug. 23 at their estate in France, while "The Avengers" star Scarlett Johansson's marriage to Romain Dauric on Oct. 1 was more on the quiet side. Highly-talked about were the wedding ceremonies of "19 Kids and Counting" siblings Jill Duggar, who married Derick Dillard on June 21, and Jessa, who tied the knot with Ben Seewald on Nov. 1. Kim Kardashian and Kanye West also exchanged their "I do's" this year, on May 24. 

Fans are now waiting to see if 2015 would be the year that Jennifer Aniston and Justin Theroux will tie the knot, after having been engaged since 2012. Charlize Theron and Sean Penn are also now reportedly engaged, although that remains to be confirmed.