The "Avengers" movie franchise has not only become popular but the actors essaying the characters have also made a special place for themselves in the hearts of ardent Marvel fans. Through an Instagram post, Robert Downey Jr. - who plays Iron Man - confirmed that Jon Favreau and Gwyneth Paltrow will be returning for the third installment of the "Avenger" movie series. Paltrow and Favreau will be Pepper Potts and Happy Hogan, respectively, the same characters they played in the "Iron Man" movies.

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Happy Hogan and Pepper Potts to return in 'Avengers 3'

In the Instagram post, the actor gave fans a sneak-peek of the set of the upcoming "Avenger 3" movie, which is set in Piedmont Park.

In the caption, he called the three "Iron Man" characters “Infinity Trinity” and gave it the hashtag #Infinitywar. Favreau later shared the same picture with the same hashtag. Marvel fans are speculating that the "Infinity War" hashtag is a reference to the title of the next "Avenger" movie. Reportedly, the production of "Avenger 3" was wrapped up sometime in mid-July. However, co-director Joe Russo contradicted such reports and stated that there are still some unfinished scenes from the movie, which will be filmed in the upcoming months.

'Avengers: Infinity War' to release in 2018

If the speculations are correct, this will be the second time Paltrow will appear in an Avengers movie. Paltrow who plays Pepper Potts first appeared in the 2012 Avengers movie, which was the first in the series.

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Favreau, a constant in the Iron Man movies and is also a producer of the Avengers franchise, was last seen in “Spiderman Homecoming.”

“The Avengers: Infinity Wars” comes with an all-star cast, which includes Paul Bettany, Benedict Cumberbatch, Dave Bautista, Chadwick Boseman, Benicio Del Toro, Don Cheadle, Josh Brolin, Chris Evans, Chris Hemsworth, Tom Hiddleston, Karen Gillan, Scarlett Johansson, Tom Holland and many more. The movie is scheduled to hit theaters on May 4, 2018.

Samuel L. Jackson will not reprise his role as Nick Fury

Although the star line-up is quite exciting, Samuel L. Jackson will not be returning to the franchise to play his role of Nick Fury in the upcoming movie. In an interview, Jackson stated that he was not a part of the “Captain America: Civil War” and neither was he called to appear in "Avengers 3" and "Avengers 4." He further stated that he is also not a part of “Black Panther,” another Marvel comic movie focusing on the superhero T'Challa Udaku. The fourth installment of the movie has been tentatively titled "Avengers 4."