Marissa Mayer Introduces Son Macallister at Halloween Party
10/31/2012 AT 02:30 PM EDT
Just like she crowdsourced suggestions for a name on Twiiter after she gave birth in September, 37-year-old Mayer Tweeted the news on Tuesday.
"One month old – Macallister and me heading to YaBoo, the children's Halloween party at @Yahoo!" she wrote, posing with her son in complementary hot pepper getups.
Macallister's arrival was also announced on Twitter, when financier dad Zachary Bogue Tweeted, "Baby boy Bogue born last night. Mom (@marissamayer) and baby are doing great – we couldn't be more excited!"