Because friends of handsome Jost say he’s hiding a warped past from the 35-year-old ‘Avengers’ star.
A source exclusively told RadarOnline.com: “Scarlett sees herself as a bit of a party girl who, when she's in the mood, can keep up with the boys, but Colin is just on a different level.
“He runs with a crew of hard-partying writers from SNL and other shows that shoot in New York, and these guys are going out nearly every night of the week.”
The source adds: “Colin and his gang have a reputation for their toxic ways and tendency to hit on every girl at the bar. Scarlett likes the bad boys she doesn’t know what she's in for here.”
While she also spent time with his family over the summer as the couple get to know one another better.
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at firstname.lastname@example.org, or call us at 800-344-9598 any time, day or night.