Chris Pratt and Katherine Schwarzenegger make red carpet debut

Chris Pratt and Katherine Schwarzenegger chose the 'Avengers: Endgame' premiere to make their first public appearance as a couple.

The 39-year-old actor and the 29-year-old author announced their engagement in January, following half a year of romance, and on Monday the pair stepped out for their first major public appearance as a couple at the film's star-studded launch at the Los Angeles Convention Center.

On the red carpet, Chris - who plays Star-Lord in the Marvel Cinematic Universe - admitted he counts his "blessings every day" that he has "good things" happening in his work life and at home.

He said: "We're all very blessed."[It's a] good time to be here for the 'Avengers' premiere and also good things happening for me in life. I just count my blessings every day."

Giving an update on the progress of their wedding planning, Chris joked to 'Entertainment Tonight': "I'm up to about my neck, you know? That's pretty deep. That's up to about 5-foot-something."I'm in it baby, I'm in it. It's good. It's a good time!"

The 'Guardians of the Galaxy' star also shared how his six-year-old son Jack - whom he has with ex-wife Anna Faris - favours Spider-Man over his own dad's Avenger.

He said: "I'm like Jack's fourth favourite Avenger. "Well, actually, now that there's even more Avengers, I think I'm like ninth favourite.

"He loves Spider-Man. He's a big Spider-Man fan. He loves Captain America, he loves Black Panther. He loves them all."

Meanwhile, Chris and Katherine are said to be taking their time with their wedding.

Photos: AFP/AP

However, when they do head down the aisle, both families - including Katherine's famous father Arnold Schwarzenegger - will be involved, and they have already been helping the happy couple with small parts of the planning.

An insider said recently: "Both families are enjoying getting to know each other more too and helping planning details for the big day."

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