But despite the starlet suffering from ‘baby brain’ since the arrival of Marlowe, she’s obviously loving her new role as mum.
Gushing about her newborn, the actress cooed, “She’s so cute.”
The Alfie star gave birth to her and fiancé Tom Sturridge’s daughter Marlowe just a few weeks ago.
Sienna kept notoriously quiet during her pregnancy, and it was her family who ended up revealing the news.
Here at MFM HQ we can’t wait to see some cute snaps of Marlowe.