Though the two have remained fairly low-key about their relationship, they have been dating for two years, and seem happy together.
Johansson doesn’t have Instagram, and Jost didn’t post anything about the happy news on his social media channels, but sources have said the stars are excited to start their lives together.
Unlike her Avengers character, The Black Widow, Johansson seems to be always looking for a love that lasts. She has been married twice before and her list of exes looks like a who’s who of Hollywood.
Sadly, many of her past relationships have ended badly. Her first marriage was to Ryan Reynolds in 2008, but after two years as husband and wife, the two called it quits in 2010. The actor quickly moved on and married Blake Lively in 2012!
Johansson took another try at love in 2014, when she married journalist Romain Dauriac. But that union also ended, and resulted in a custody battle over their daughter, 4-year-old Rose Dorothy Dauriac.
Will Johansson’s marriage to Jost last? Take a look back at the actress' rocky road to love in this Radar gallery.
Scarlett's first love was her high school boyfriend, Fun. guitarist Jack Antonoff. The duo dated for two year while both attended the Professional Children's School on Manhattan's Upper West Side. But they broke up shortly after graduation.
It’s no joke(r)! The actress and 30 Seconds to Mars frontman were romantically linked as early as 2004.
The former couple met on the set of Black Dahlia and reportedly dated from 2005 to 2007.
ScarJo’s first marriage was to Deadpool star Ryan Reynolds. The famously private couple started dating in 2007, marrying a year later at a wilderness retreat outside Vancouver.
In December 2010, after two years of marriage, Johansson and Reynolds announced their separation. "We entered our relationship with love, and it's with love and kindness that we leave it," they said in a joint statement at the time.
Johansson rebounded with the much-older Sean Penn. The actress, then 26, was spotted with the then 50-year-old Penn on a series of dates around L.A. In February of 2011, the couple made headlines after they decided to take a trip down to Mexico together.
The actress dated the advertising executive for a year before they split in October 2012.
Scarlett’s second marriage was to French journalist and art collector Romain Dauriac, whom she started dating almost immediately after her breakup from Taylor.
Together they welcomed daughter Rose Dorothy, now 4, before getting married in 2014. However, their marriage would be over in just two years, sparking a bitter custody battle over the child, and whether she would be raised in France or the U.S.
Finally, in September 2017, Johansson and Dauriac finalized their divorce and ended their nasty custody battle, submitting a sealed settlement in Manhattan Supreme Court.
One month later, ScarJost went public with their relationship.
Saturday Night Love
They met when she hosted SNL earlier that year, and almost instantly, dating rumors started.
“She was after him and all over him,” an insider revealed. “He was star struck.” And now, they are engaged!