I was 3 months old when I was Christened, but Lydia was 8 months.
I'm Catholic, so Lydia was Christened as a Catholic also.
DH is nothing really, he's never been Christened, but the priest said it was okay as long as I raise her as a Catholic, take her to church, etc etc.
The way I had it done was firstly I phoned the priest.
Then he said I had to speak to this woman who organises the Christenings after church, so I found her and she gave me a form to fill in, stating my name, DH's name, Lydia's name, our address, plus the addresses and names of 2 godparents.
Now with it being a Catholic church, they are pretty strict about godparents.
The child can have either 1 or 2 godparents.
If there are 2, one must be male and one must be female.
At least one godparent must be a practicing Catholic.
If one is not Catholic, they must at least be a practicing Christian (or any demonination). In this case they become not a godparent, but a Christian Witness.
So we chose my cousin Paul as godfather and my friend Amy as "godmother" (Christian Witness - she's C of E).
We also had to go through this other sheet, which asked questions like "how often do you go to church?" "do you reject satan?" "do you promise to raise your child as a Catholic and take her to church?" and all that sort of thing.
Then after that, for several weeks, DH and I had to attend meetings at the priest's house every Saturday night, along with other couples who wanted their children to be baptised, and we had to discuss the sacrament of baptism and watch all these videos about raising your child as a Catholic, and that kind of thing.
Then finally she was allowed to be baptised.
A lot of rigmarole if you ask me, but there we go lol.
ETA: it turned out to be a lovely day though