Catherine announced her happy news on Twitter, tagging her partner Tom Pitfield in her cute tweet.
Her message read: "We made a wish and you came true. Welcome Alfie James Pitfield. We love you beyond words @TP_PTfitness #Besotted."
- Catherine Tyldesley (@Cath_Tyldesley) March 18, 2015
Tom then added his own sweet words, tweeting: "Welcome to the world son. Alfie James Pitfield. @Cath_Tyldesley you made the happiest man in the world. Thank you x" Catherine, who plays Eva Price in the ITV soap, has been keeping fans updated on Twitter throughout her pregnancy – sharing bump selfies with her 269k followers on a regular basis.
According to our baby name finder, Alfie means 'wise', while James is a classic Anglo-Saxon name meaning 'replace'.
Congratulations, Catherine and Tom!