Sitcoms where a star of the show sings the theme tune?
Frasier
The Young Ones
Bread
Gimme Gimme Gimme
Others?
Sing tha feem tooon?
All in the Family
The Muppet Show
For the longest time I thought the OFAH theme was sung by the cast.
Two's Company
A Fine Romance
Just Good Friends
Ok, this isn't exactly a theme tune but Ronnie Barker spoke the opening lines of Porridge.
He sang the theme to Going Straight too
Didn't Paul Shane sing Hi-Di-Hi?
Quote: lofthouse @ 2nd November 2013, 10:35 PM GMTHe sang the theme to Going Straight too
Didn't Paul Shane sing Hi-Di-Hi?
Yes.
Minder-Dennis Waterman
Quote: george roper @ 3rd November 2013, 12:28 AM GMTMinder-Dennis Waterman
Not a sitcom. 
I think Paul Shane (with Bob Monkhouse) also sang the theme tune to You Rang, M'Lord?. 
I liked that show 
Cybill
P.S that is not a robot version of BillWill
Citizen Smith
Bread
Quote: Aaron @ 3rd November 2013, 4:21 AM GMTNot a sitcom.
Quite correct. He did however do On The Up as well - is a sitcom
Quote: Aaron @ 3rd November 2013, 4:21 AM GMTNot a sitcom.
I think Minder looks like a lot of the more gangstery bits of EastEnders sewn together.
The Old Guys sing the theme in series 2.
Kath and Kim... Kim sings the theme tune.
South Park the kids all have singing parts in the theme.
The Goodies
The Brady Bunch (after the first season, IIRC)