Well, we suppose if you are going to finally get round to booking a babysitter then Oscars night would be your first choice.
Plus, it's probably just nice to get out the (squillion quid) house for the evening.
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And Reese made it a late one, turning up to the Vanity Fair after party to carry on the night into the wee hours.
We just hope she doesn't have to be up with baby this morning and hubby Jim Toth has made her a bacon sarnie!
Reese gave birth to baby Tennessee James Toth in September, a little brother for her other children Ava, 13 and Deacon, 9 from her previous relationship with Ryan Phillipe.
And Reese says it was fashion savvy Ava who picked out her Oscars look.
"My daughter and I picked it out," the 36-year-old told Ryan Seacrest as she entered the Dolby Theatre Sunday. "She said, 'this is a winner!"
And we reckon Gok Wan should watch out, sounds like this Ava knows what she is on about as Reese looks drop dead gorge!