Actress Daniela Ruah and husband David Olsen have welcomed their second child!

The NCIS: Los Angeles star gave birth to a baby girl named Sierra Esther on Sunday, Sept. 4, and announced the news with an Instagram photo.

MUST SEE: 'American Idol' Alum Brooke White Welcomes a Baby Boy!

"Apparently she thought Labor Day weekend meant LABOR day weekend… Look who showed up 3 weeks early!" the 32-year-old captioned the pic. "She entered the world in her own way- breeched!"

View this post on Instagram

Apparently she thought Labor Day weekend meant LABOR day weekend… Look who showed up 3 weeks early! On September 4th we welcomed little Miss Sierra Esther Ruah Olsen! She entered the world in her own way- breeched! I was a good candidate to deliver her naturally so I needed to find a doctor in LA who would know how to do it. Fortunately I found one of the few… Healthy & happy mommy & baby walked out of the hospital 24hrs later. I had an OB and doula assisted birth at Cedars Sinai, and the #love and #support of my wonderful #hubby ❤️ This photo is the perfect representation of everything I've ever wanted. #Family #ExhaustedbuthighonLife #Amothersrighttochoose #InformedBirth @binibirth — Pelos vistos ela achou que o Dia do Trabalhador (nos EUA) significava dia do TRABALHO DE PARTO… Olha quem decidiu aparecer com 3 semanas de antecedência! No dia 4 de Setembro demos as boas vindas à menina Sierra Esther Ruah Olsen! Deu entrada no mundo da sua própria maneira- de apresentação pélvica! Eu era boa candidata para dar à luz naturalmente nesta situação e por isso tive de encontrar um médico em Los Angeles que ainda o soubesse fazer. Felizmente encontrei um dos poucos… Mamã e bebé saíram do hospital saudáveis e felizes 24 horas depois. Foi um parto assistido por um obestetra e uma doula no Cedars Sinai, e o amor e apoio do meu maridão ❤️ Esta foto representa tudo o que sempre quis. #Família #Exaustamasfelizdavida #ODireitodeescolhadamã

A post shared by Daniela Ruah (@danielaruah) on

The brunette beauty added, "I was a good candidate to deliver her naturally so I needed to find a doctor in LA who would know how to do it… Healthy & happy mommy & baby walked out of the hospital 24hrs later… This photo is the perfect representation of everything I've ever wanted."

The proud parents also share a two-year-old son named River Isaac. Their new addition comes 11 months after Daniela suffered a devastating miscarriage.

Congrats to the new family-of-four!