She was one seventh of pop band S Club.

But now it seems that Tina Barrett's ideal party size is for three - as she's announced her and boyfriend Paul Cashmore are expecting their first child.

Speaking to OK! Magazine, the former chart-topper revealed she's expecting her first-born on June 19th and plans for wedding bells shortly after.

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Congratulations! S Club 7 star Tina Barrett and boyfriend Paul Cashmore are expecting their first child in June

Chatting about the news, Paul reveals they were ‘in shock’ when a pregnancy test revealed a positive result, admitting: ‘We’d only been trying for three months.’

Mum-to-be Tina met Paul back in 2012 on the set of Russell Grant’s charity music video for The Clapping Song and explains: ‘Until Paul I hadn’t really met a man I wanted to have children with.

‘I’m 40 this year so there was a part of me that was worried I might have left it too late, but thankfully that wasn’t the case.’

Back in the day: Tine alongside former pop-pals Rachel Stevens, Hannah Spearritt and Jo O'Meara

Out now: Read the full interview in the new edition of OK! Magazine, available from Tuesday 15 March

Of her former band mates’ responses to the good news, Tina tells us: ‘Jo [O’Meara] burst into tears. She’s so sweet, she couldn’t have been happier for us.’

The dancer adds: ‘I’d love for my child to be friends with Jo and Rachel’s [Stevens] children. Perhaps we could encourage them to start their own band, that would be cute!’

Admitting they talk about marriage ‘all the time’, Paul reveals: ‘Before Tina got pregnant we were considering flying to Las Vegas to tie the knot, just the two of us.’

His girlfriend is quick to add: ‘Things have changed now we’re having a baby – we’d want him or her to be there, so I imagine we’ll do something a bit bigger when the time comes.’

But Paul is keen to keep details of an impending proposal a secret, admitting: ‘I want to take Tina by surprise. She knows it’s coming, though.

'I’d like us to be married within a year of the baby being born.’

Tina has kept a relatively low profile since the group parted ways back in 2003.

During her time with S Club 7, she enjoyed an impressive chart run which included four number on singles, a number one album and sold more than 15 million records worldwide.

Parents to be: Tina and Paul pictured getting close last summer at London's Charing Cross Theatre