We say 'inner redhead' because her youngest son with Will Arnett - Abel - has a bright crop of the gruaig rua gracing his lovely head, so the gene is charging around somewhere in there.   

The 43-year-old actress/writer/presenter/general goddess - who was clearly affected by her recent visit to these shores (we all have red hair here sure, check yer beard if you need further confirmation) - unleashed the new doo at the 60th Anniversary of Allen Ginsberg's Howl With Music, Words, and Funny People event in LA on Tuesday.

As for reaction at large, people are thrilled. 

As for why she dyed her hair red, one can only assume she thought "How could I possibly be even more deadly?"