"Can't tell you how much the positive tweets mean," Warren Tweeted on Wednesday night. "Smiles from ear to ear. lots of love back at cha."
Alba took to Twitter herself to thank her fans for their support and sweet messages. "Ok ya'll...have a great night," she wrote on Wednesday evening. "And again I can't thank you enough for all of the wonderful messages you sent me today."
Alba, 29, announced her pregnancy via Facebook and Twitter, writing on Wednesday, "Honor is going to be a Big Sister," referring to her 2½-year-old daughter.