The `Fantastic Four` actress announced she and husband Cash Warren were "thrilled" to be expecting their second child who would be a younger brother or sister to two-year-old daughter Honor.
Writing on Facebook, the 29-year-old beauty said: "It`s been a while since I`ve been on FB & I thought I`d drop by to let you all in on some exciting news. Honor is going to be a Big Sister!
"Cash and I are thrilled and wanted to share the news directly with you so you didn`t hear about it somewhere else. I appreciated all of the love and support you all gave me during my first pregnancy and will definitely appreciate it again this time around. Have a great day!(sic)"
Jessica - who married Cash in May 2008 - recently revealed becoming a mother had made her a "little more wild".
She said: "Oddly, I think I`m a little more wild and free since I had Honor because once she`s in bed all my mom friends come over and we have dance parties at my house.
"It`s really dorky and I probably wouldn`t have done that before. But no, I don`t go out. I hang out with my friends and I`m pretty chilled."