Tom Cruise has reportedly purchased his own ultrasound machine so he can watch his baby with Katie Holmes growing in the womb in the comforts of home.

The Hollywood heavyweight is said to regularly scan Katie's tummy so the smitten pair can see their first child developing.

The 43-year-old actor - who has two adopted children with first wife Nicole Kidman - told talk show host Barbara Walters, "I bought a sonogram machine. I am going to donate it to a hospital when we are done."

The 'War of the Worlds' star also insisted he and Katie - who plan to tie the knot next year - don't know their baby's sex, saying, "I don't know. I just see a baby."

Meanwhile, the couple have allegedly decided their baby will be the ring-bearer at their nuptials.

The couple allegedly postponed their wedding because they are desperate for the tot to be involved in their special day.

A source is quoted in Britain's Daily Star newspaper as saying, "There's no way he's letting his first biological child miss his wedding. It will be a celebration not only of their love, but of their new family. And knowing Tom, it'll be a big celebration."

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