Will Ferrell and Sofia Vergara have joined the cast of 'Despicable Me 4'.

Will Ferrell has joined the Despicable Me franchise

Will Ferrell has joined the Despicable Me franchise

The film's new stars were revealed in a trailer for the sequel - which comes seven years after the third movie's release - with Ferrell voicing Gru's new nemesis in Maxime Le Mal and Vergara voicing his his femme fatale girlfriend Valentina.

There are also new characters voiced by 'Bullet Train' actress Joey King, TV host Stephen Colbert and 'Saturday Night Live' regular Chloe Fineman.

In the film, Gru [Steve Carrell] and Lucy [Kristen Wiig] welcome a new family member - a son named Gru Jr. who is intent on tormenting his dad - but the family faces upheaval as they must go on the run.

It's the fourth 'Despicable Me' movie in the franchise which was expanded with two Minions movies - 2015's 'Minions ' and 'Minions: The Rise of Gru' which was a huge box office success when it was released in 2022.

'Despicable Me 4' hits theatres on July 3.

Steve Carell has played loveable supervillain Gru throughout the series and he previously admitted he loves working on the films because they are "not condescending to children".

Speaking at CinemaCon, Steve said: "They're really good movies. They're not condescending to children either, and that's one of the reasons I signed on to do these.

"When I read the first script, and I saw all the artwork, I was like, there's a little danger here, and kids love that – not too much, but just enough to be exciting and new and different, that had a different tone to it."

'The Office' actor also revealed the origin of Gru's voice and says he adopted it because it made his children laugh.

Steve explained: "The reason I actually do that voice is because it's the voice that made my kids laugh. When I went in before I did my first taping. I said, 'Hey, guys, [Gru voice] what do you think of this?' And they're like, 'That's the one, just do that.'"