No wedding date has been set, according to Pariseau.
This will be the first marriage for the Saturday Night Live star, 36, while it will be Scarlett's third.
The Avengers: Endgame star, 34, finalized her divorce from her second husband, Romain Dauriac, in September 2017 after filing in March of that year.
They share 4-year-old daughter Rose.
She was also married to actor Ryan Reynolds for just over two years from September 2008 to December 2010.