Chris Pratt takes on alleged social media impostor

The actor warns fans of a "potential predator" using his name on social media to prey on women.
2:18 | 12/02/17

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Transcript for Chris Pratt takes on alleged social media impostor
Star Chris Pratt is trying to shield his reputation. Yeah, so here's what the concern is. It's extending to his fans. He learned that somebody is apparently trying to impersonate him and ABC's Marci Gonzalez is in Los Angeles with the story. Marci, good morning to you. Reporter: Good morning. Not the easiest past few days for the actor. He just filed for divorce from Anna Faris after months of separation and is dealing with what he believes is a potentially dangerous impostor. He's used to going avrilens on the big screen. But this morning "Guardians of the galaxy" star press Pratt is on a real-life mission to stop what he calls a potential predator online. The actor warning fans on social media writing somebody is trying to pretend to be me on Facebook and maybe other social media platforms apparently hitting on a lot of different female fans trying to get their numbers and who knows what else. It's unclear right now what the impostor's motives exactly are, whether they're out to harm Chris by pretending to hit on these vulnerable female fans or whether they're trying to take advantage of his fans. Reporter: The 38-year-old who first made viewers laugh on "Parks and recreation." Next thing you know -- dirt. Reporter: Posting his very serious reaction to the impostor writing, if I find out who it is, I'll have their account shut down and seriously would like to punch them. Pratt whose Instagram feed is filled with photos and videos of his son jack shared his fears for the youngest of his millions of social media followers writing, look for the blue verified checkmark. If there is no checkmark by my name that person is an impostor. Tell your siblings. Ucate our young ones. It's probably mostly kids who would fall for this. Makes me sick. Facebook tells ABC news the impostor's account has been taken down adding anyone claiming to be another person on Facebook violates our community standards. Facebook also tells us they have a dedicated team that works to detect and block these kinds of scams and they encourage anyone who comes across questionable accounts to report them. Guys, back to you. You can do a lot of mischief online and social media these days. Marci, thank you very much.

This transcript has been automatically generated and may not be 100% accurate.

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