Why old? Because we still associate Adam Brody with the OC's most awkward (but totally fanciable) teen, Seth Cohen. And Seth is just not adult enough to be a dad. Except of course he is, because Seth doesn't exist and Adam is actually 35-years-old. Thirty. Five.
Anyway, moving on. Leighton and Adam revealed they were adding a new member to their family when Leighton was spotted with an unmissable baby bump whilst out for lunch in LA at the weekend.
A notoriously private couple – after secretly tying the knot early last year, the couple have still not commented on their nuptials almost 18 months later – we're not expecting Instagram pictures of Adam kissing Leighton's baby bump a la Justin Timberlake and Jessica Biel.
But, that's not to say that Leighton's always been tight-lipped on her want for her family. Speaking to Nylon magazine last year, the actress admitted that kids were next on the agenda.
'Most people I know are starting to get married. It'll be kids next,' the 29-year-old actress told the magazine. 'I like the grown-up stuff. I like having a house. I've got dogs.'
And, of course, Leighton will be able to pick the brains of her former Gossip Girl co-star Blake Lively on all things pregnancy. Maybe Blake will even give Leighton her maternity wear cast-offs. And if she doesn't want them, we'll have them…