Especially now he's thrown an impromptu 'first day party' for the show's staff after the first day of shooting on Friday.
The 33-year-old and his wife Demi Moore, 48, hosted the bash in the back room of Hollywood hotspot Troubadour, and were 'buying drinks' for everyone that came, according to UsMagazine.com.
The source said that the couple were 'both cute together and friendly with everyone.'
Ashton, who has replaced troubled actor Charlie Sheen on the US TV show, is reportedly becoming very popular on the set of the programme.
A source said: 'Everybody is loving Ashton on the set.
'He's really coming off like a cool low maintenence guy, and with everything that went down with Charlie everyone is breathing a sigh of relief.
'He jokes with the crew, has no tantrums, he comes in well studied in his lines - it's such a nice change. So far there have been no issues and everyone is really happy with how it's working out.'
The source added: 'Nobody is missing Charlie right now.'