Showbiz
Rex Features
Stevens, 30, said that she would not be inviting the other six members because she is no longer in contact with them.
"I haven't seen any of S Club 7 for so long, so, no, I don't think any of them will be there at the wedding," she told Star magazine.
"Not because I don't want them to but because we're not really in touch any more. Our paths have gone in different directions."
Stevens will wed long-term boyfriend Alex Bourne, 31, in August.
S Club 7 were together for four years, scoring four UK number one singles, one UK number one album, a BBC TV series and a movie before splitting in 2003.
Jo O'Meara, Bradley McIntosh and Paul Cattermole reformed the group as a three-piece last year. Actress Hannah Spearritt, Tina Barrett, Jon Lee and Stevens chose not to take part.
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