Jessica Alba; Jessica Simpson
Jim Smeal/BEImages; Jamie McCarthy/Getty
01/04/2012 at 05:00 PM EST
Looks like two of Hollywood's most famous Jessicas have a mutual admiration for one another.
– who is expecting her first child
with fiancé Eric Johnson this spring – complimented Jessica Alba
on her post-baby bikini body
just five months after welcoming daughter
Haven with husband Cash Warren.
"New goal: look like @jessicaalba after baby. Job well done lady!" Simpson, 31, Tweeted Tuesday
Alba was flattered by the praise, responding on Twitter
, "OMG! Ur so sweet! Thx hon!"
While the pals may soon be sharing post-pregnancy slim-down tricks, what about parenting advice?
"I'm friends with her so I'm going to talk to her about that personally," Alba, 30, recently told PEOPLE
Not only do Simpson and Alba have growing families (and a first name) in common, but also both have Ivy League loves, whom they joined at the Yale reunion