Travis Scott is back in a big way — the guy headlined his first big solo show since the Astroworld tragedy … making his official comeback across the pond for Britons.

The rapper is performing an arena concert Saturday at London’s O2 — where he’s doing two shows this weekend — hitting the stage at around 9:30 PM local time. No introductions were needed … TS just dove right into his set standing at the top of an elevated platform.

Trav was decked out in some futuristic costume with shades on … and almost immediately, he cranked the energy level in the room up to 10 — like he normally does for his shows.

After running through a couple songs up there, he made his way down … where he kept the hype up. The audience seemed to be rocking with him all throughout. BTW  — the place is absolutely packed, including in the nosebleeds … and everyone looks to be vibing so far.

So far, nothing too crazy is going on. Yes … Travis is screaming/jumping around, per usual, but he doesn’t appear to be encouraging anyone to lose their minds beyond what they’re already doing. He’s literally just performing and staying in his element — so it’s all kosher.

Also … Kylie Jenner and their daughter Stormi are present for Travis’ big day. Trav just dedicated a song, “Mamacitas,” to her, saying he knew she was there in the building.

Like we said, this is Travis’ first solo performance of this scale since last November. He’s obviously performed publicly since then — in smaller venues and even via cameos at music festivals here in the U.S. — but this is a big deal … ’cause it’s billed as strictly a Travis gig.

He’s going to be headlining some other major events later this year — including a festival in South America — and he even has a Vegas residency all set up for him too next month.