Rabbits fenced in garden!

Somehow, a rabbit or rabbits gor into my fenced garden. First I saw a big one and now at least one little one. Any suggestions about how to drive them out?

Step one in my mind would be to thoroughly check the fencing for how they got in. Some rabbits dig, others chew through wire (they can definitely chew through chicken wire.) From experience, I see no point chasing them out if I can't keep them out.

More info would help:
1. How large a garden?
2. What sort of fencing? How high?
3. Any idea if they've set up a home? Where are they sleeping?
4. Are you willing to consider a permanent solution?

^^ excellent ideas, all of them.

I keep rabbits in a fenced run in my garden (surrounded by delicious nibbles) and they occasionally invent a new way to get out of the run. A domesticated rabbit (which is fat and well-fed) will easily dig/crawl under fencing and that is usually the route, but they can somehow squeeze their chunky behinds through any space their head fits through too. And even the wee ones can easily jump to my waist height if they want out. A wily, hungry wild rabbit is probably capable of much more devilry. Check your fence and good luck!!

Get a few people to help you drive it out. Each person should have 5-6' "arm extenders" in the form of sticks or plastic pipe that can be waved around. Open your gate and drive the rabbit out. It helps if the gate is near a corner. Last year we used the waving arms method to drive out a small bunny with just my husband and me, both vintage gardeners. The same bunny came back at least 8 times and got quite used to the routine. Eventually it grew big enough that it couldn't squeeze through the 2"x4" mesh to return. When I was much younger I chased a trespassing bunny until it was tired, got it cornered, and grabbed it, giving it a toss over the fence. Not doing that again at age 70+.

the rabbits might have a burrow within the fence.

Rabbits dig complex tunnels underground.