Express-js wildcard routing to cover everything under and including a path

I'm trying to have one route cover everything under /foo including /foo itself. I've tried using /foo* which work for everything except it doesn't match /foo. Observe:

var express = require("express"),
    app = express.createServer();

app.get("/foo*", function(req, res, next){
  res.write("Foo*\n");
  next();
});

app.get("/foo", function(req, res){
  res.end("Foo\n");
});

app.get("/foo/bar", function(req, res){
  res.end("Foo Bar\n");
});

app.listen(3000);

Outputs:

$ curl localhost:3000/foo
Foo
$ curl localhost:3000/foo/bar
Foo*
Foo Bar

What are my options? The best I've come up with is to route /fo* which of course isn't very optimal as it would match way too much.