Pregnant Gossip Girl Kelly splits from millionaire hubby.

Kelly Rutherford, 40 who plays Lily van der Woodsen on the CW tween-er filed for divorce in LA County Superior Court from her hubby German entrepreneur Daniel Giersch, 30. 

On the same day he submitted his own filing as well.

Both papers cited "irreconcilable differences", natch.

In addition to the bun in the oven, the one time couple has a prior child Hermés Gustaf Daniel Giersch who is as old as their marriage lasted - all of two years.

This was Rutherford's 2nd attempt at marriage.