Wonder what THOSE sweet nothings were! Katy Perry and Orlando Bloom showed some serious PDA on the red carpet of his new Amazon Prime series Carnival Row Wednesday night. Now we're just waiting for the wedding date for these two!

Orlando recently spoke about his sexual connection with Katy, saying, "I would say that sex is a really important part of life because it’s a way to connect, it’s a way to show intimacy. Intimacy is an incredibly important part of life because if you can be intimate with somebody, then you’re blessed, right?"

Interestingly enough, Orlando -- going into MARRIAGE -- says the cards are stacked against it working out between him and Katy! "Being engaged is a lot of work, but we’re building a castle that we can inhabit. For both of us, we feel old enough and wise enough to know that the odds are stacked up against any relationship," he said in a recent interview. Ummm, we bet Katy's not to happy to hear this!

Meanwhile, Bloom's co-star Cara Delevingne talked to reporters at the premiere about Katy's rift with her pal Taylor Swift, saying she's SO glad it's over! "I hate it when people hold grudges — not that either of them have grudges. I just think that it was hard for people to literally conquer geography and meet at the same time, and just sit and chat. That is what people forget, just sitting and chatting will just fix everything. I think, nothing, no grudges, nothing should ever be held onto. So, I’m just glad," she said.

Cara looked FIERCE on the red carpet -- channeling a butterfly in her Iris van Herpen couture gown. Check her out!