Hook up two speakers to one PC

Here's the scoop...

I have a 2.1 speaker set with the one simple audio cable (green cable).
Also, I have the awesome Logitech Z-5500 5.1 surround sound system (black, green, and orange cables).

The problem is, I need that green input for both sets of speakers, so would a simple audio splitter do the trick?

Thanks for your help

yeah i think ill stick with the Y connector.
my surround sound speakers are for my TV, so it's not set up for PC use

i only need the surround sound to play music from my computer instead of playing on my crappy 2.1 set. I didnt mind playing music on my surround sound from my PS3, but its much more of a hassle as far as playlist settings go, etc.

anyways, thanks for your replay!