The actress dressed for the chilly British weather in a smart trouser suit as she walked the red carpet on Monday evening (19 January).
Amber and Johnny held hands for photographers: a clear sign that those recent split rumours were way off base.
The couple became engaged last year but in December it was rumoured wedding planning was on hold, which an insider telling E! News: "They are constantly on the rocks."
However, last night's loved up display says this definitely isn't the case!
Johnny's new film Mortdecai is a crime caper about a loveable rogue art dealer-turned-secret sleuth. It co-stars Gwyneth Paltrow and Ewan McGregor.
Mortdecai is released in UK cinemas on 23 January.