Despite rumours of a pre-nup war, new parents JAMIE-LYNN SPEARS and CASEY ALDRIDGE are planning to get married before the end of the year.

The teen couple welcomed its first child, Maddie, into the world last month, and Spears, 17, and 19-year-old Casey are said to be planning a wedding in the groom's hometown of Liberty, Mississippi, where they share a home.

The pair have been at odds with Jamie-Lynn's parents LYNNE and JAMIE SPEARS after Casey refused to sign a pre-nup agreement.

Lynne and Jamie are desperate to protect Jamie-Lynn's fortune and were said to be furious that their youngest daughter was willing to go ahead with the wedding anyway.

But according to OK! magazine, the big day is definitely on.

The couple - who have been engaged since March - are said to be planning a low-key southern-style wedding, with superstar big sister BRITNEY stepping in as maid of honour.

A source tells the tabloid, "She loves everything about the area where she lives. She's not going to get married at some luxury resort in the Caribbean or a hotel in Beverly Hills."

And the bride-to-be has been working out furiously to shed her baby weight so she can fit into the wedding dress of her dreams.

The insider adds, "She's already down to her pre-pregnancy weight."