A lithographic printing plate precursor comprising a substrate and an imageable layer disposed over the substrate, the imageable layer comprising: a free radically polymerizable component, an initiator composition capable of generating free radicals upon exposure to imaging infrared radiation, an infrared radiation absorbing dye, and a polymeric binder, wherein the infrared radiation absorbing dye is a cyanine dye that is represented by the following Structure: wherein: R 1 is L-R x wherein (i) L is a sulfur or nitrogen atom and R x is an organic group that comprises a carbon atom connected to L and comprises one or more ethylenically unsaturated polymerizable groups, provided that when L is a nitrogen atom, L-R x represents N(R a)(R b) wherein R a and R b are the same or different groups which are as defined for R x, or (ii) L is a single connecting bond, and R x is a group represented by the following Structure wherein Y is oxygen or sulfur, and R y and R z are the same or different organic groups which are as defined for R x, at least one of which comprises one or more ethylenically unsaturated polymerizable groups: R 2 and R 3 each independently represent an organic group having 1 to 12 carbon atoms, R 4 and R 5 either both represent hydrogen atoms or, together with the carbon atoms to which they are bonded, comprise carbon atoms to form a five- or six-member carbocyclic ring, R 6 to R 9 each independently represents hydrogen, or an alkyl group or aryl group, and R 10 and R 11 independently represent hydrogen or halogen atoms, or alkyl, alkoxy, -COOR, -OR, -SR, or -NR 2 groups, wherein R is hydrogen or alkyl, or R 10 and R 11 independently represent sufficient carbon atoms to form a fused aromatic ring, and A represents one or more optional counter ions sufficient to provide a neutral charge for the cyanine dye; or a cyanine dye selected from: and a free radically polymerizable component, an initiator composition capable of generating free radicals upon exposure to imaging infrared radiation, an infrared radiation absorbing dye, and a polymeric binder, wherein the infrared radiation absorbing dye is a cyanine dye that is represented by the following Structure: wherein: R 1 is L-R x wherein (i) L is a sulfur or nitrogen atom and R x is an organic group that comprises a carbon atom connected to L and comprises one or more ethylenically unsaturated polymerizable groups, provided that when L is a nitrogen atom, L-R x represents N(R a)(R b) wherein R a and R b are the same or different groups which are as defined for R x, or (ii) L is a single connecting bond, and R x is a group represented by the following Structure wherein Y is oxygen or sulfur, and R y and R z are the same or different organic groups which are as defined for R x, at least one of which comprises one or more ethylenically unsaturated polymerizable groups: R 2 and R 3 each independently represent an organic group having 1 to 12 carbon atoms, R 4 and R 5 either both represent hydrogen atoms or, together with the carbon atoms to which they are bonded, comprise carbon atoms to form a five- or six-member carbocyclic ring, R 6 to R 9 each independently represents hydrogen, or an alkyl group or aryl group, and R 10 and R 11 independently represent hydrogen or halogen atoms, or alkyl, alkoxy, -COOR, -OR, -SR, or -NR 2 groups, wherein R is hydrogen or alkyl, or R 10 and R 11 independently represent sufficient carbon atoms to form a fused aromatic ring, and A represents one or more optional counter ions sufficient to provide a neutral charge for the cyanine dye; or a cyanine dye selected from: and R 1 is L-R x wherein (i) L is a sulfur or nitrogen atom and R x is an organic group that comprises a carbon atom connected to L and comprises one or more ethylenically unsaturated polymerizable groups, provided that when L is a nitrogen atom, L-R x represents N(R a)(R b) wherein R a and R b are the same or different groups which are as defined for R x, or (ii) L is a single connecting bond, and R x is a group represented by the following Structure wherein Y is oxygen or sulfur, and R y and R z are the same or different organic groups which are as defined for R x, at least one of which comprises one or more ethylenically unsaturated polymerizable groups: R 2 and R 3 each independently represent an organic group having 1 to 12 carbon atoms, R 4 and R 5 either both represent hydrogen atoms or, together with the carbon atoms to which they are bonded, comprise carbon atoms to form a five- or six-member carbocyclic ring, R 6 to R 9 each independently represents hydrogen, or an alkyl group or aryl group, and R 10 and R 11 independently represent hydrogen or halogen atoms, or alkyl, alkoxy, -COOR, -OR, -SR, or -NR 2 groups, wherein R is hydrogen or alkyl, or R 10 and R 11 independently represent sufficient carbon atoms to form a fused aromatic ring, and A represents one or more optional counter ions sufficient to provide a neutral charge for the cyanine dye; or a cyanine dye selected from: and