Mila Kunis and Ashton Kutcher are planning to get married in a registry office.
The couple, who got engaged earlier this month, are expecting their first child together and are keen to tie the knot in April before their new bundle of joy arrives.
A source told The Sun newspaper: "They are planning to get married in LA in April. They just want it to be made legal so are happy with a registry office.
"Mila, especially, wants it to be very low-key, with just their family there and a BBQ in their garden afterwards. She doesn't want to do anything showy or over the top."
Though they are planning low-key nuptials, Ashton - who was previously wed to Demi Moore - wants to mark their marriage with a big celebration later in the year.
The source added: "Ashton wants a party for all their friends later in the year in the south of France, which Mila is up for, depending on how they cope with having a baby."
The loved-up pair are adamant they will be "hands-on" parents when their baby arrives and are said to have ruled out hiring nannies, despite them both having busy acting careers.
The duo sparked engagement rumours a few weeks ago when Mila, 30, was spotted wearing a diamond sparkler on her ring finger while out shopping in Los Angeles.
Ashton, 36, began dating the brunette beauty in 2012, following his split from Demi, but they have known each other for years after playing the lead roles in hit 1990s sitcom 'That '70s Show'.