Tracey Connelly, Steven Barker and Jason Owen were jailed in May
The three people responsible for the death of baby Peter Connelly have appealed against their sentences.
Peter died in Haringey, north London, in the care of mother Tracey Connelly, 28, her partner Steven Barker, 33, and Barker's brother Jason Owen, 37.
Connelly, Barker and Owen received minimum prison terms of five, 12 and three years respectively for causing or allowing Peter's death.
The Court of Appeal confirmed all have lodged appeals against their sentences.
A spokeswoman for the Court of Appeal said: "The appeals are currently being looked at by a judge.
"A decision is expected within the next three to four weeks."
In a separate court case, Barker was given a minimum sentence of 10 years for raping a two-year-old girl.
Peter died despite being on Haringey's child protection register
He has also appealed against that sentence, the Court of Appeal confirmed.
Peter had more than 50 injuries, including fractured ribs and a broken back, when he was found dead in a property in Penshurst Road, Tottenham, in August 2007.
The 17-month-old boy died despite being on Haringey Council's child protection register.
Connelly, Barker and Owen were jailed at the Old Bailey in May.
All three were named earlier this month after a court anonymity order expired.
It also emerged that Owen had changed his name to avoid being connected to the killing of Peter.
Probation union Napo said the notoriety of the Baby Peter case was such that all three were likely to be given new identities upon release to protect them from vigilante attacks.