Celebrity Big Brother has arrived - and it was a lot.

There were TOWIE celebrities, Mob Wives celebrities, Geordie Shore celebrities, X Factor celebrities, and more. A real smorgasbord of reality show veterans who will no doubt have us gripped with some so bad it's good car crash telly in the coming weeks. Here were Twitter's best bits as the opening night unfolded. The first housemate to enter one Christopher Biggins, who's got some... experience with reality TV. https://twitter.com/bbuk/status/758755286110920704 https://twitter.com/charlieparrish/status/758764027954823174 Next up came Saira Khan off Loose Women https://twitter.com/bbuk/status/758756355075403776 https://twitter.com/sarcastathon/status/758756737981775872 Then we got the first Atlantic curveball to enter the house: Ariana Grande's brother, Frankie. https://twitter.com/bbuk/status/758757337318453248 Who subsequently got into some stickyness when he introduced himself to Saira. Oops. https://twitter.com/ShaunKitchener/status/758758868319145984 Then came Fatboy, Ricky Norwood, fresh off of EastEnders. We like him. We hope he has a good time in the house. https://twitter.com/bbuk/status/758759556143087617 https://twitter.com/meggiemberton/status/758759914491801600 Then came the big bawse Renne Graziano from Mob Wives. TV stars on TV stars up in here. https://twitter.com/bbuk/status/758760667583250432 Things only got better when Marnie off Geordie Shore arrived. https://twitter.com/bbuk/status/758761944857841664 Things will probably get... explosive between her and Renee. https://twitter.com/heyimshelbyy/status/758762213746307072 Then things soured when UK shock Jock James Whale got entry https://twitter.com/bbuk/status/758764298843877376 How quickly did the mood change? This quickly. https://twitter.com/Carterface_/status/758765069295550465 Things got heated. https://twitter.com/AndyGilder/status/758765069098487808 Real heated https://twitter.com/thisisdavid/status/758764941402894337 But it's fine, because Aubrey O'Day came to brighten our lives. https://twitter.com/bbuk/status/758765711112171520 Although by this time, people were noticing stuff... https://twitter.com/subedited/status/758763110064852992 https://twitter.com/Mike_P_Williams/status/758766354367479808 But whatever, next up was Stephen Bear, a former flame of Geordie Shore's Vicky Pattison.  https://twitter.com/bbuk/status/758766809298460672 And by now we were really getting into the Celebrity Big Brother groove...

No, wait, now there's a lad who definitely wears Voi jeans and Henleys T-shirts. This is so appalling it's addictive

— Amy (@Carterface_) July 28, 2016

And then came 2010 X Factor contestant Katie Wassiel. https://twitter.com/bbuk/status/758769284462088192 So then we got loads of this. https://twitter.com/dan9700/status/758769894875955200 Not to mention a couple of these. https://twitter.com/Shellx7/status/758769602012864513 Right, focus. Lewis Bloor from TOWIE was in next. That's another veteran. https://twitter.com/bbuk/status/758770668452405249 Cue more delightful snark https://twitter.com/notgavin/status/758770947977519104 And this: https://twitter.com/Sianwelby/status/758772757207351297 But we're in the home straight so no time for dwelling *looks at notes* Grant Bovey was in next, who *checks scribbling on hand*  used to be married to Anthea Turner https://twitter.com/bbuk/status/758773285391917056 He got roasted loads. https://twitter.com/nickieohara/status/758773632034365440 Like, LOADS. https://twitter.com/orianemessina/status/758773830076760064 https://twitter.com/lexfirth/status/758773715916193792 https://twitter.com/SnoozeActive/status/758774276321337344 https://twitter.com/VicEbuwaSlick/status/758773587805347840 Still Anthea rose above and made this lovely comment about her ex. https://twitter.com/AntheaTurner1/status/758779887259877377 Then came the big dawgs. Chloe Khan was in https://twitter.com/bbuk/status/758774889247547392 We are here for it. Everyone was tbh. https://twitter.com/bottrill/status/758776793453191169 https://twitter.com/Aisleyne1/status/758775074447056897 How'd you top Ms. Khan? You get in Arsenal diehard and musician Heavy D https://twitter.com/bbuk/status/758777189429047300 Gentle reminder: https://twitter.com/hayleyminn/status/758778243084328960 Not to mention what Arsenal fans can do with public votes. https://twitter.com/Redbutdred/status/758782868063649792 And to top it all off, the lovely Sam Fox joined us. https://twitter.com/bbuk/status/758778708161429504 https://twitter.com/AndyGilder/status/758779661669240833 And that made 15 guests, a bunch load of tweets, and one knackered TV reporter. It's going to be a fun summer watching all these celebs bounce off each other.