Heating Things Up!

Things seem to be getting a bit serious between Michelle Williams and director Spike Jonze.

The two recently shared an intimate dinner at Little Dom's in Los Angeles this weekend.

An according to an insider, "During dinner they would lean in and kiss each other over the table."

And by the end of dinner, Williams had hopped onto Jonze's lap.

That's when the couple proceeded to "smooch."

Jonze "had his arm around [Williams] and kissed her on the cheeks, then on the lips."

Of course, both reps have no comments.

[Images via WENN.]

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