"There's a lot of people who live in the Valleys and a lot of people who've lived in the Valleys over the years - not just in music but in other arts and industry and so on" says Peter Cole, from Capital Region Tourism.
"We have sent people out from the Valleys across the world to change the world and now we need to change perceptions of the Valleys for people coming back".
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Many places will start dry, but rain in the southeast will spread to most for a time overnight.
The family of Isaac Nash who went missing after being swept out to sea last summer have presented a cheque for £10,000 to the RNLI.
There is likely to be a good deal of cloud around today, thickest in the southeast, where outbreaks of rain are possible at times.