Apparently, there's wedding fever in the Olsen family.

A mere few weeks after Mary-Kate Olsen got engaged to her longtime (and much older) French boyfriend Olivier Sarkozy, her baby sis, "It" actress Elizabeth Olsen, is now engaged, too! A source confirmed the news to Us Weekly.

Elizabeth, who became an indie darling after her performance in 'Martha, Marcy, May, Marlene,' is reportedly planning to swap vows with her boyfriend, actor Boyd Holbrook, whom she has been dating since 2012.

Olsen, 25, and Holbrook, 32, met on the set of their movie 'Very Good Girls,' which also featured Dakota Fanning and Demi Moore in its cast.

Another source told Us Weekly, "They've been by each other for a while, taking a lot of couple time," saying that the couple has been "talking about getting engaged" and recently took a trip to Paris together."

A different source said the pair moved into together in Brooklyn a few months ago because of course they did.

Another Elizabeth Olsen fun fact? She is the "Elizabeth" in Elizabeth and James, the contemporary, celeb-loved fashion line launched by Mary-Kate and Ashley. James is their brother. She also looks just like her older sisters.